Electrical -- Basic Knowledge -- 251 Chassis: Overview Mercedes-Benz R-class W251 facelift

Table of contents for function description of on-board electrical system control - GF54.10-P-0998GM

MODEL 164.1 as of model year 2009

/CY 08 model refinement package

MODEL 164.8, 251.0/1 as of model year 2009

/CY 08

Overview of system components of on-board electrical system control - GF54.10-P-9995GM

MODEL 164.1 as of model year 2009

/CY 08 model refinement package

MODEL 164.8, 251.0/1 as of model year 2009

/CY 08

Central gateway control unit, component description - GF54.21-P-4170GM

MODEL 164.1 as of Model Year 09/Modification Year 08 model refinement package

MODEL 164.8, 251.0/1 as of Model Year 09/Modification Year 08

Shown on model 164.1

Scheme 9

Location

The central gateway control unit is mounted onto the vehicle floor below the driver seat.

Task

The central gateway control unit has the following tasks

1. Gateway
2. Variant coding
3. Data container
4. Reverse gear signal generation

Gateway

The central gateway control unit serves as an interface between the following databus systems

1. Diagnostic CAN
2. Interior CAN
3. Engine compartment CAN

Diagnostic CAN

The primary purpose of the diagnostic CAN is to allow connection of an external diagnostic unit. This is used to diagnose control units.

This is achieved via diagnosis request messages which the diagnostic unit sends to the control unit in question.

The central gateway control unit responds to these diagnosis request messages with diagnosis response messages.

Interior compartment CAN

The central gateway control unit routes the information from the control units connected to the interior CAN to the control units connected to the engine compartment CAN by placing the information on the engine compartment CAN or establishes a connection between the diagnostic CAN and interior CAN for diagnostic purposes.

Engine compartment CAN

The central gateway control unit routes the information from the control units connected to the engine compartment CAN to the control units connected to the interior CAN by placing the information on the interior CAN or establishes a connection between the diagnostic CAN and engine compartment CAN for diagnostic purposes.

The functional gateway messages are sent, irrespective of the circuit status, over the interior CAN. By contrast, the control units on the engine compartment CAN only send at circuit 15 ON. The gateway messages are therefore only transmitted on the engine compartment CAN when circuit 15 is on. Routing from the interior CAN to the diagnostic CAN is only possible with an active interior CAN

Variant coding

The central gateway control unit sends information (e.g. model series and national version) over the interior CAN, engine compartment CAN and diagnostic CAN to the corresponding control units.

Data container

The data container in the central gateway control unit is a mobile data memory.

Data specific to vehicle, test site or control unit are stored in the data container within the cycle.

These data can be used in the subsequent tests for test sequence control. The total size of the data memory is 128 bytes.

Reverse gear signal generation

The "Reverse gear engaged" signal is sent irrespective of the transmission version over the interior CAN by the central gateway control unit. The reverse gear signal is generated by evaluating the "Transmission selector lever" over the engine compartment CAN.

Wiring diagram of central gateway control unit Model 164 PE54.21-P-2124-99MAA Model 251 PE54.21-P-2124-99RAA

Central gateway control unit, component description - GF54.21-P-4170RT

MODEL 251.1/0 up to Model Year 8

Scheme 10

Location

The central gateway control unit is located in the driver footwell, on the left, toward the front of the vehicle

Task

1. Gateway between: CAN B CAN C CAN D
2. Version coding; on networked control units, the central gateway control unit transmits information (e.g. model series or national version) to the corresponding control unit via CAN B, CAN C and CAN D bus.
3. Router between CAN B and CAN D
4. Router between CAN C and CAN D
5. Diagnosis between CAN C and CAN D
6. Diagnosis between CAN B and CAN D
7. Data container

Three CAN buses connected via the central gateway control unit are installed in the vehicle

1. Controller area network bus, class B (interior compartment) (CAN B) 83.3 kbit/s
2. Controller area network bus, class C (engine compartment) (CAN C) 500 kbit/s
3. Controller area network bus, class D (diagnosis) (CAN D) 500 kbit/s

Gateway functions

Explanation of terms

1. DLC (Data Link Control), length information for following data
2. Identifier, information for receiver and priority information

Functional gateway

During normal vehicle operation, information present on the CAN bus and required on another bus for control unit functions, are routed by the central gateway control unit.

Diagnosis gateway

In the diagnosis mode, i.e. when an external tester is connected, the diagnosis request messages are routed to the appropriate control units by the tester. In the other direction, it is necessary for the control unit to route the diagnosis response messages to the tester.

Types of routing on function gateway

Two types of routing are differentiated

1. Routing entire CAN message
2. Routing individual signals (a CAN message)

Routing entire CAN message

When routing an entire CAN message, the message received on the source bus is transferred 1:1 to the destination bus. Routing therefore has the following characteristics in terms of the source and destination bus

1. The data bytes are the same.
2. The cycle time is the same.
3. As a rule, the DLC is the same. However, it can be smaller in the destination message than in the source message.
4. As a rule, the identifier is the same. However, it can be different on the source and destination bus. As a rule the identifier is not changed. However, it may be necessary to change the identifier in order to avoid overlaps on the destination bus.

If the DLS for the message on the destination bus is smaller than the DLC for the message on the source bus, the data bytes are copied 1:1 beginning with byte 1 to byte DLC on the destination bus.

All diagnosis messages have a length of eight data bytes (DLC = 8).

Routing individual signals of a CAN message

When routing individual signals in a CAN message, certain signals are extracted from the CAN message received from the source bus and transferred to the destination bus in a different CAN message.

A signal is a constituent of a CAN message and can be structured as follows

1. Bit

Since the signals on the source and destination CAN can be contained in different messages, the cycle times with which the signals are transferred can also change.

Routing therefore has the following characteristics in terms of the source and destination bus

1. Signals in different CAN messages
2. Therefore different DLC and identifier
3. Different cycle times

Type of routing (routing of complete CAN message)

The message received on the CAN bus in question (CAN B/CAN C/CAN D) is transferred directly to the CAN in question after receipt.

1. Bit sequence
2. Byte
3. Byte sequence

Behavior in case of time-out for received messages

Transfer of gateway messages from CAN D to CAN B is accomplished only when a message has been received on the CAN D

If a gateway message has not been received on the CAN D, such a message is not sent to the CAN B

Influence of circuit 15

The functional gateway messages are transferred to the CAN B regardless of the circuit status. The control units on the CAN C transmit, by contrast, only when circuit 15 is "ON".

The functional gateway messages are therefore transmitted to the CAN C only when circuit 15 is "ON".

Influence on network management

Routing from CAN B to CAN D is accomplished only when CAN B is active.

Influence of global version coding

(with special equipment when communications platform is present)

On the basis of the global version coding stored in the central gateway control unit it is recognized whether the special equipment communication platform is present on the CAN D. If the communication platform is not present, no functional gateway messages are transferred to the CAN D.

Special case, reverse gear signal

The "Reverse gear" engaged signal is transferred by the central gateway control unit to the CAN B for all transmissions. The reverse gear signal is configured by evaluation of the "Selector lever position" signal by the CAN C.

If the signal coincide, the "Reverse gear" signal is set. The reverse gear signal is a special case for a functional gateway signal.

Data container

The data container in the central gateway control unit represents a mobile data memory.

Within the throughput cycle data specific for the vehicle, test location and control unit is stored in the data container.

This data can be used for test sequence control in the following tests. The total size of the data memory is 128 bytes

Rain/light sensor, component description - GF54.21-P-6000RT

MODEL 251.1/0 up to Model Year 8

Scheme 11

Location

The rain/light sensor is located on the inside of the windshield below the inside rearview mirror.

Task

To measure the light intensity and degree of wetting of the windshield.

Function principle of rain sensor

Infrared light is beamed from the infrared transmitter unit (1) and is directed to the windshield (3). The intensity of light reflected at the windshield (3) is measured by the IR-receiver unit (2).

If the windshield (3) is dry in the area of the rain/light sensor (picture A), then the light is almost completely reflected and the IR-receiver unit (2) measures a high light intensity.

If the windshield (3) is wet in the area of the rain/light sensor (picture B), then part of the light is scattered out of the glass of the windshield (3). As a result the intensity of the reflected light reduces and the IR-receiver unit (2) measures a lower light intensity.

The light intensity measured by the IR receiver (2) is a measure for the quantity of water on the windshield (3). The lower the measured light intensity the greater the amount of water on the windshield (3). As of production period 01.06.2006 the sensitivity of the sensor can be preset via the combination switch (S4) with the positions "intermittent 1" and "intermittent 2".

Scheme 12

Function principle of light sensor

The rain/light sensor measures the light intensity falling on it from outside.

The information is transmitted via the overhead control panel control unit (N70) on the Controller Area Network-Bus Class B (interior) (CAN-B)

Upper control panel control unit, component description - GF54.21-P-6040GM

MODEL 164.1 as of model year 2009

/YoM 08 model refinement package

MODEL 164.8, 251.0/1 as of model year 2009

/YoM 08

Shown on model 164

Scheme 13

Location

The upper control panel control unit is located in the center of the instrument panel.

Design (model 164 except model 164.195)

The upper control panel control unit (N72/1) contains the following operating and display components

Scheme 14

1. Automatic child seat recognition airbag OFF indicator lamp (N72/1e1)
2. ATA [EDW] function indicator (N72/1e2) (with code (551) Antitheft alarm system (ATA [EDW]))
3. ESP OFF switch (N72/1s1)
4. Level control switch (N72/1s2) (with code (489) Airmatic (air suspension with level adjustment and adaptive damping system (ADS))
5. Hazard warning system switch (N72/1s5)
6. Left front HS [SIH] switch (N72/1s10) (with code (873) Left and right front seat heaters or with code (401) Front comfort seats, incl. seat heating and seat ventilation)
7. Right front HS [SIH] switch (N72/1s11) (with code (873) Left and right front seat heaters or with code (401) Front comfort seats, incl. seat heating and seat ventilation)
8. Left front seat ventilation switch (N72/1s13) (with code (401) Front comfort seats, incl. seat heating and seat ventilation)
9. Right front seat ventilation switch (N72/1s14) (with code (401) Front comfort seats, incl. seat heating and seat ventilation)
10. Downhill Speed Regulation switch (N72/1s24) (with code (430) Off-road package)
11. Off-road program switch (N72/1s25) (with code (430) Off-road package)
12. STH switch (N72/1s30) (with code (228) Stationary heater)
13. Comfort/Sport switch (ADS) (N72/1s31) (with code (489) Airmatic (air suspension with level adjustment and adaptive damping system (ADS))

Design (model 164.195)

The upper control panel control unit (N72/1) contains the following operating and display components

Scheme 15

1. Automatic child seat recognition airbag OFF indicator lamp (N72/1e1)
2. ATA [EDW] function indicator (N72/1e2) (with code (551) Antitheft alarm system (ATA [EDW]))
3. ESP OFF switch (N72/1s1)
4. Level control switch (N72/1s2) (with code (489) Airmatic (air suspension with level adjustment and adaptive damping system (ADS))
5. Hazard warning system switch (N72/1s5)
6. PTS OFF switch (N72/1s8) (with code (220) PARKTRONIC)
7. Left front HS [SIH] switch (N72/1s10) (with code (873) Left and right front seat heaters or with code (401) Front comfort seats, incl. seat heating and seat ventilation)
8. Right front HS [SIH] switch (N72/1s11) (with code (873) Left and right front seat heaters or with code (401) Front comfort seats, incl. seat heating and seat ventilation)
9. Left front seat ventilation switch (N72/1s13) (with code (401) Front comfort seats, incl. seat heating and seat ventilation)
10. Right front seat ventilation switch (N72/1s14) (with code (401) Front comfort seats, incl. seat heating and seat ventilation)
11. Comfort/Sport switch (ADS) (N72/1s31) (with code (489) Airmatic (air suspension with level adjustment and adaptive damping system (ADS))
12. Transmission mode switch (N72/1s32) (with code (489) Airmatic (air suspension with level adjustment and adaptive damping system (ADS))
13. Refueling safety detection switch (N72/1s46)

Structure (model 251)

The upper control panel control unit (N72/1) contains the following operating and display components

Scheme 16

1. Automatic child seat recognition airbag OFF indicator lamp (N72/1e1)
2. ATA [EDW] function indicator (N72/1e2) (with code (551) Antitheft alarm system (ATA [EDW]))
3. ESP OFF switch (N72/1s1)
4. Level control switch (N72/1s2) (with code (489) Airmatic (air suspension with level adjustment and adaptive damping system (ADS))
5. Hazard warning system switch (N72/1s5)
6. PTS OFF switch (N72/1s8) (with code (220) PARKTRONIC)
7. Left front HS [SIH] switch (N72/1s10) (with code (873) Left and right front seat heaters or with code (401) Front comfort seats, incl. seat heating and seat ventilation)
8. Right front HS [SIH] switch (N72/1s11) (with code (873) Left and right front seat heaters or with code (401) Front comfort seats, incl. seat heating and seat ventilation)
9. Left front seat ventilation switch (N72/1s13) (with code (401) Front comfort seats, incl. seat heating and seat ventilation)
10. Right front seat ventilation switch (N72/1s14) (with code (401) Front comfort seats, incl. seat heating and seat ventilation)
11. STH switch (N72/1s30) (with code (228) Stationary heater)
12. Comfort/Sport switch (ADS) (N72/1s31) (with code (489) Airmatic (air suspension with level adjustment and adaptive damping system (ADS))
13. Transmission mode switch (N72/1s32) (with code (489) Airmatic (air suspension with level adjustment and adaptive damping system (ADS))

Task

The upper control panel control unit has the following tasks

1. Reading in of switches and signals
2. Evaluation of input factors
3. Actuation of components

Reading in of switches and signals

The input factors are read in with the following connections

1. Direct line
2. Instrument panel LIN (LIN 1)
3. Interior CAN

Direct line

The signals from the switches in the upper control panel control unit are read in directly.

LIN 1

The following components are read in via LIN 1

1. Rotary light switch (S1)
2. Lower control panel control unit (N72) (model 164)

Interior CAN

The following sensors and information are read-in over the interior CAN

1. From the instrument cluster (A1): Dimming of instrument illumination
2. From STH control unit (A6n1): Status of stationary heater
3. From the restraint system control unit (N2/7) over the central gateway control unit (N93): Status of front passenger seat occupied and child seat recognition sensor
4. From the front SAM control unit (N10): Status of front seat heaters (with code (873) Heated left and right front seats or with code (401) Front comfort seats, incl. seat heating and seat ventilation)
5. From the rear SAM control unit (N10/8): Status of antitheft theft alarm system (ATA [EDW]) (with code (551) Antitheft alarm system (ATA [EDW])) Status of hazard warning system Status of refueling safety detection (on model 164.195)
6. From seat heater, seat ventilation and steering wheel heater control unit (N25/7) (with code (872) Electric seat heater for left and right rear seats, with code (401) Front comfort seats, incl. seat heating and seat ventilation and with code (443) Steering wheel heater): Status of rear seat heaters and front seat ventilation
7. From ESP control unit (N47-5) (except model 164.195) or regenerative braking system control unit (N30/6) (on model 164.195) via central gateway control unit: Status of Electronic Stability Program (ESP) Status of Downhill Speed Regulation (with code (430) Offroad package) Status of Offroad program (with code (430) Offroad package)
8. From AIRMATIC control unit (N51) (with code (489) Airmatic (air suspension with level adjustment and Adaptive Damping System (ADS)) via central gateway control unit: Status of level control Status of shock absorber adjustment
9. From PTS control unit (N62) (with code (220) PARKTRONIC): Status of PARKTRONIC
10. From EZS control unit (N73): Circuit status
11. From fully integrated transmission control unit (VGS) (Y3/8n4) (except model 164.195) or from hybrid fully integrated transmission control controller unit (Y3/10) (on model 164.195) via central gateway control unit: Status of transmission mode

Evaluation of input factors

The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.

Actuation of components

Components are actuated with the following lines

1. Direct line
2. LIN 1
3. Interior CAN

Direct line

The following components are actuated via a direct line

1. Automatic child seat recognition airbag OFF indicator lamp
2. ATA [EDW] function indicator
3. Switch and controls illumination and function indicators of integrated switches

LIN 1

The following components are actuated via LIN 1

1. Lower control panel control unit (power supply and switch and controls illumination)
2. Rotary light switch (switch and controls illumination)

Interior CAN

The signals are sent by the upper control panel control unit over the interior CAN.

The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).

Wiring diagram for upper control panel and lower control panel control unit Model 164 PE54.21-P-2118-97MAA Wiring diagram for upper control panel control unit Model 251 PE54.21-P-2119-97RAA

Upper control panel control module component description - GF54.21-P-6040RT

MODEL 251 up to Model Year 8

Scheme 17

Location

The upper control panel control unit is located in the center console.

Task

Scanning the following switches

1. ESP OFF switch (N72/1s1)
2. Left front HS [SIH] switch (N72/1s10)
3. Right front HS [SIH] switch (N72/1s11)
4. Level adjustment switch (N72/1s2)
5. Comfort/Sport switch (ADS) (N72/1s31)
6. Hazard warning system switch (N72/1s5)

Reading in the following function indicator lamps

1. Automatic child seat recognition airbag OFF indicator lamp (N72/1e1)
2. ATA [EDW] function indicator (N72/1e2)

Voltage supply and reading in of data

1. of exterior lamp switch (S1) over an LIN bus

Function

ESP OFF switch

The ESP Off switch can be used to switch the anti-slip control of the "Electronic Stability Program" on and off. The function requirements for this switch is circuit 15 "ON". The function of the ESP systems is indicated in the instrument cluster (A1).

Left front HS [SIH] switch and right front HS [SIH] switch

The heated seats have 3 stages. One-time actuation of the SIH switch activates stage 3 of the heated seats (all 3 red LEDs light up). Further actuations switch to stage 2 (the two lower LEDs go on), to stage 1 (the lowest LED goes on), or the heated seats are switched off (no function indicator). The function requirements for this switch is circuit 15R "ON". Each press of the left front HS [SIH] switch and right front HS [SIH] switch is sent by the upper control panel control unit over the CAN-B.

Level control switch

Function requirements

1. Term. 15 "ON"

Switch actuations enable the driver to choose between a highway level and a raised level. The vehicle is in the highway level state (no function indicator). If the vehicle is lifted to the raised level, the LED in the switch flashes on and off. When the level is reached the LED remains constantly on. The last stage selected with function indicator is active once the engine is started again.

Comfort/Sport switch (ADS)

The driver can use the Comfort/Sport switch (ADS) to program the damping stage

1. "AUTO" Skyhook mode
2. "SPORT" Firm damping
3. "COMFORT" Soft damping

In the "SPORT" setting the upper LED goes on and for the "COMFORT" setting the lower LED goes on. If the vehicle is in the "AUTO" mode nothing is displayed in the Comfort/Sport switch (ADS).

Hazard warning system switch

Pressing the hazard warning system switch wakes-up the upper control panel control unit from its "Sleep mode" and the hazard warning system function is activated. The message is sent cyclically (every 100 ms) until the function is deactivated by pressing the hazard warning system switch again. The flashing function illumination of the hazard warning system switch is triggered by the CAN message of the rear SAM control unit (N10/8). There is no faster flashing of a defective indicator lamp for the hazard warning flasher system. As soon as the hazard warning flasher function is activated the switch and controls illumination for the hazard warning system switch is switched off. The function illumination of the hazard warning system is not dimmed.

The selected function is confirmed when the indicator lamps (LEDs) light up. The pulse to light up is sent by each respective control unit

Discrete inputs

1. Tml. 30
2. (Term. 31)
3. CAN-B

Discrete outputs

1. Tml. 30
2. (Term. 31)
3. LIN bus

Voltage limit

The operating voltage lies between 12 V and 14 V.

Steering column module component description - GF54.21-P-6050RT

MODEL 251.0/1 up to Model Year 8

Scheme 18

The steering column module is located on the steering column in the vehicle interior.

Tasks

Data exchange with Controller Area Network bus Class C (engine compartment) (CAN C) and local interconnect network (LIN)

Scanning

1. Combination switch (S4) Turn signal switch (turn signal/one-touch turn signaling) Front windshield wipe/touch wiping-/wash/wipe switch Rear windshield wipe/wash switch High beam/headlamp flasher
2. Steering column adjustment up/down, in/out switch (S59/1s1) (electrically adjustable steering column (code 441) Steering column in/out and up/down
3. DIRECT SELECT gear selector switch (S16/13) "operated in vertical direction (drive positions)" R - Reverse N - Upwards - neutral 0 - Park position N - Downwards - neutral D - Forwards DIRECT SELECT gear selector switch "operated in axial direction" P - Engage park pawl
4. Steering angle sensor (N49)
5. Multifunction steering wheel (is read in via LIN) Left multifunction steering wheel button group (S110) Scroll forward/back button (S110s1) System selection button (S110s3) Fanfare horn system button (S110s5) Right multifunction steering wheel button group (S111) Button + and -, adjustment of specific functions and volume control (S111s1) Accept/terminate phone call button (S111s3) Fanfare horn system button (S111s5)

The steering column module has the following direct inputs

1. Circuit 30
2. Terminal 31
3. Airbag ignition circuit 1 (signal input)
4. Airbag ignition circuit 2 (signal input)

The steering column module has the following direct outputs

1. Airbag plug (stage 1)
2. Airbag plug (stage 2)

Component description for the steering column module control unit - GF54.21-P-6051GM

MODEL 164.1 as of Model Year 09/Modification Year 08 model refinement package

MODEL 164.8, 251.0/1 as of Model Year 09/Modification Year 08

Shown on model 164.1

Scheme 19

Location

The steering column module is located on the steering column.

Task

The steering column tube module is connected to the interior CAN and engine compartment CAN for data exchange.

Communication takes place between the multifunction steering wheel and the steering column tube module via the steering LIN.

The steering column tube module has the following tasks

1. Reading in of sensors, pickups and signals
2. Actuation of components
3. Output of signals

Reading in of sensors, pickups and signals

The input factors are read in with the following connections

1. Direct line
2. Steering LIN
3. Engine compartment CAN

Direct line

The signals for the following components are read in directly

1. Steering angle sensor (N49)
2. Combination switch (S4)
3. DIRECT SELECT gear selector switch (S16/13)
4. CC [TPM] push button (S40/4) (without code (494) USA version)
5. CC [TPM] push button switch (S40) (with code (494) USA version)
6. Steering column adjustment switch (S59) (with code (275) Memory package (driver seat, steering column, mirrors))
7. Steering column adjustment/steering wheel heater switch (S59/1) (with code (275) Memory package (driver seat, steering column, mirrors) and code (443) Steering wheel heater)

The signals of the following components are only looped through the fanfare horns and airbag clock spring contact (A45)

1. From restraint systems control unit (N2/7) to Driver airbag squib 1 (R12/13) and to
2. Driver airbag squib 2 (R12/14)

Steering LIN

The signals for the following components are read in over the steering LIN

1. Left multifunction steering wheel button group (S110)
2. Steering wheel gear shifter MINUS (S110/1)
3. Right multifunction steering wheel button group (S111)
4. Steering wheel gear shifter PLUS (S111/1)

Engine compartment CAN

The steering column tube module uses the engine compartment CAN and receives signals from the following components

1. Instrument cluster (A1)
2. Intelligent servo module for DIRECT SELECT (A80)
3. Restraint systems control unit
4. EIS [EZS] control unit (N73)
5. Central gateway control unit (N93)

Actuation of components

Actuation takes place over the following connections

1. Direct line
2. Steering LIN

Direct line

The following component is actuated directly

1. Yellow LED, variable speed limiter (S40/4v1) (except code (494) USA version)

Steering LIN

The following components are actuated via the steering LIN

1. Switch and controls illumination (circuit 58d) of components connected

Output of signals

The signals are output over the following connection

1. Engine compartment CAN

Engine compartment CAN

Signals are sent to the following components over the engine compartment CAN

1. CDI control unit (N3/9) (on diesel engine)
2. ME-SFI [ME] control unit (N3/10) (on gasoline engine)
3. ESP control unit (N47-5)
4. Headlamp range adjustment control unit (N71) (model 251 with code (615) Bi-xenon headlamp unit with integrated curve illumination or code (616) Bi-xenon headlamp unit with integrated asymmetrical curve illumination)
5. Intelligent servo module for DIRECT SELECT
6. Xenon headlamp control unit (E1n1 and E2n1) (Model 164 with code (615) Bi-xenon headlamp unit with integrated curve illumination or code (616) Bi-xenon headlamp unit with integrated asymmetrical curve illumination)
7. EIS [EZS] control unit
8. Central gateway control unit

Wiring diagram for steering column module control unit Model 164 PE46.10-P-2101-99MAA Model 251 PE46.10-P-2101-99RAA

Component description for front SAM control unit - GF54.21-P-7010GM

MODEL 164.1 as of model year 2009

/Modification Year 08 model refinement package

MODEL 164.8, 251.0/1 as of model year 2009

/CY 08

Scheme 20

Model 164, shown on model 164.1

Location

The front SAM control unit is located under the front passenger seat on the right next to the battery.

Model 251, shown on model 251.1

Scheme 21

Location

The front SAM control unit is located in the front passenger footwell in front of the battery.

Task

The front SAM control unit has the following tasks

1. Reading in of sensors, pickups and signals
2. Evaluation of input factors
3. Control of systems
4. Actuation of components
5. Switching of relays
6. Switching internal relays

Reading in of sensors, pickups and signals

The input factors are read in via the following connections

1. Direct line
2. Interior CAN (CAN B)

Direct line

The signals from the following components are read via a direct line

1. Left rear power window switch (S21/3)
2. Right rear power window switch (S21/4)
3. Hall sensor of left rear power window motor (M10/5)
4. Hall sensor of right rear power window motor (M10/6)
5. Brake fluid indicator switch (S11)
6. Parking brake switch (S12)
7. Coolant level indicator switch (S41)
8. Windshield washer system fluid level indicator switch (S42)
9. Right front brake pad contact sensor (S10/2)
10. Right rear brake pad contact sensor (S10/4)

Interior CAN

The signals are read in by the front SAM control unit via the interior CAN.

The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).

Evaluation of input factors

The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.

Control of systems

The front SAM control unit controls the following systems

1. Wiper system
2. Exterior lighting
3. Headlamp cleaning system (with code (600) Headlamp cleaning system)
4. Footwell lighting
5. Washer nozzle heater
6. Seat heater (with code (873) Seat heater, left and right front seat)
7. Power windows in the rear
8. Left rear door lock

Actuation of components

Components are actuated with the following connection

1. Direct line

Direct line

The following components are actuated via a direct line

1. Left front lamp unit (E1)
2. Right front lamp unit (E2)
3. Model 164.1 as of 1.8.10 with code (236) LED version of daytime running lights, model 164.8 as of 1.7.09, model 0/1 as of 1.8.10
4. Left daytime running lights headlamp (E1/3)
5. Right daytime running lights headlamp (E2/3)
6. Model 164.1 up to 31.7.10 and as of 1.8.10 without code (236) LED version of daytime running lights, Model 164.8 up to 30.6.09 and as of 1.7.09 without code (236) LED version of daytime running lights, Model 251.0/1 up to 31.7.10 and as of 1.8.10 without code (614) Bi-xenon headlamp unit and without code (618) Bi-xenon headlamp: Left front fog lamp (E5/1) Right front fog lamp (E5/2)
7. Standing light and left parking lights (E1e3) (on model 251 up to 31.7.10)
8. Standing light and right parking lights (E2e3) (on model 251 up to 31.7.10)
9. Right front footwell lamp (E17/15)
10. Left front footwell lamp (E17/16)
11. Right rear footwell lamp (E17/17)
12. left rear footwell lamp (E17/18)
13. Left rear power window motor
14. Right rear power window motor
15. Left rear door CL [ZV] motor (M14/8)
16. Center washer nozzle heater (R2/1)
17. Left heated windshield washer nozzle (R2/2)
18. Right washer nozzle heater (R2/3)
19. Windshield washer fluid pump (M5/1)
20. HCS [SRA] pump (M5/2) (with code (600) Headlamp cleaning system)
21. Left front seat heated cushion (R13/1) (with code (873) Left and right front-seat seat heater)
22. Left front backrest heated cushion (R13/2) (with code (873) Left and right front-seat seat heater)
23. Right-seat seat heated cushion (R13/3) (with code (873) Left and right front-seat seat heater)
24. Right front backrest heated cushion (R13/4) (with code (873) Left and right front-seat seat heater
25. Additional battery (G1/7)

Switching of relays

The following relays are switched by the front SAM control unit

1. Wiper level relay 1/2 (F58kA)
2. Wiper ON/OFF relay (F58kB)
3. Fanfare horn relay (F58kF)
4. Circuit 15 relay (F58kH)

Switching internal relay

1. Relay for seat heater (emergency shutoff)

Wiring diagram for front signal acquisition and actuation module (SAM) control unit Model 164, sheet 1 PE54.21-P-2114-97MAA Model 164, sheet 2 PE54.21-P-2114-97MAB Model 164, sheet 3 PE54.21-P-2114-97MAC Model 164, sheet 4 PE54.21-P-2114-97MAD Model 251, sheet 1 PE54.21-P-2114-97RAA Model 251, sheet 2 PE54.21-P-2114-97RAB Model 251, sheet 3 PE54.21-P-2114-97RAC Model 251, sheet 4 As of 1.8.10 PE54.21-P-2114-97RAD

Front SAM control unit, component description - GF54.21-P-7010RT

MODEL 251.1/0 up to Model Year 8

Scheme 22

Location

The front SAM control unit is located in the right underfloor assembly below the front seat.

General

For data exchange purposes the front SAM control unit is connected to the Controller Area Network bus class B (interior) (CAN-B).

Task

The front SAM control unit reads in the following signals, sensors and switches, actuates the function and switch and controls illumination and then actuates the following relay and consumers by way of semiconductor switches.

Control

1. Front exterior lights
2. Footwell lamps
3. Washer nozzle heater
4. Front wiper park position heater
5. Front wiper system
6. Windshield washer fluid pump
7. Headlamp cleaning system (for headlamp cleaning system, code 600)
8. Heated windshield washer system (for heated windshield washer system, code 875)
9. Heated front seats via a timer control
10. Power windows for rear side windows
11. Left rear door central locking system
12. Additional battery charging process (G1/7)

Reading in and outputting the following signals

1. Circuit 31b
2. Circuit 61 (engine 113 only)
3. Circuit 58d
4. Air suspension wake-up signal

Reading in following switches, pickups and sensors

1. Left rear power window switch (S21/3)
2. Right rear power window switch (S21/4)
3. Brake fluid indicator switch (S11)
4. Parking brake switch (S12)
5. Coolant level indicator switch (S41)
6. Windshield washer system fluid level indicator switch (S42)
7. Left front brake pad contact sensor (S10/1)
8. Right front brake pad contact sensor (S10/2)
9. Left rear brake pad contact sensor (S10/3)
10. Right rear brake pad contact sensor (S10/4)

The front SAM control unit reads in the parking brake indicator switch and transmits the signal to the CAN-B

When the parking brake is tightened and the wheel pulse counter Delta does not change for a set time (t = 2s), the driver-side instrument panel PTS warning indicator (A44/1) and rear dome lamp PTS warning indicator (A44/3) are deactivated.

Switching internal relay

1. Safety relay for switching off heated seats, if an implausible signal is recognized.

Switching consumers via semiconductor switches

1. Left high beam (E1e1)
2. Left low beam (E1e2)
3. Left standing and parking lamp (E6/13)
4. Left turn signal lamp (E1e5)
5. Right high beam (E2e1)
6. Right low beam (E2e2)
7. Right standing and parking lamp (E6/14)
8. Right turn signal lamp (E2e5)
9. Left front fog lamp (E5/1)
10. Right fog lamp (E5/2)
11. Right front footwell lamp (E17/15)
12. left front footwell lamp (E17/16)
13. Right rear footwell lamp (E17/17) (SA)
14. Left rear footwell lamp (E17/18) (SA)
15. Additional battery
16. Windshield washer fluid pump (M5/1)
17. SRA pump (M5/2)
18. Left rear power window motor (M10/5)
19. Right rear power window motor (M10/6)
20. Left rear door CL [ZV] motor (M14/8)
21. Center washer nozzle heater (R2/1)
22. Left heated windshield washer nozzle (R2/2)
23. Right washer nozzle heater (R2/3)
24. Left front seat heated cushion (R13/1)
25. Left front backrest heated cushion (R13/2)
26. Right front seat cushion heater element (R13/3)
27. Right front backrest seat cushion heater element (R13/4)
28. Air spring wake-up signal
29. Left front side-marker lamp (E6/1) (with code 494 USA version)
30. Right front side-marker lamp (E6/2) (with code 494 USA version)
31. Left center air outlet illumination (E10/1)
32. Left air outlet illumination (E10/2)
33. Right air outlet illumination (E10/3)
34. Right center air outlet illumination (E10/4)

Switching of following relay

1. Fanfare horn relay (F58kF)
2. Wiper level relay 1/2 (F58kA)
3. Wiper ON/OFF relay (F58kB)
4. Circuit 15 relay (F58kH)

Heated seats actuation

The heating resistors of the seats for driver and front passenger are actuated by the front SAM control unit in accordance with the following tables

HEATED SEATS ACTUATION

Operation of heated seat switch with function indicator

OPERATION OF HEATED SEAT SWITCH WITH FUNCTION INDICATOR

Component description for rear SAM control unit - GF54.21-P-7030GM

MODEL 164.1 as of model year 2009

/Modification Year 08 model refinement package

MODEL 164.8, 251.0/1 as of model year 2009

/CY 08

Shown on model 164.1 up to 31.6.09

Scheme 23

Location

The rear SAM control unit is located in the right of the luggage compartment.

Model 164.1 as of 1.7.09

Scheme 24

Location

The rear SAM control unit is located on the right under the rear bench seat.

Task

Depending on the function sequence the rear SAM control unit supplies various systems and control units with voltage via limit switches. In addition the rear SAM control unit has the following tasks

1. Reading in of sensors, pickups and signals
2. Evaluation of input factors
3. Control of systems
4. Actuation of components
5. Switching of relays

Reading in of sensors, pickups and signals

The input factors are read in via the following connections

1. Direct line
2. Interior CAN (CAN B)

Direct line

The signals from the following components are read via a direct line

1. Interference suppression filter for radio antenna (A49/6)
2. Rear door locking unit (A72)
3. Fuel pump with fuel gauge sensor (M3/3)
4. Right front door rotary tumbler microswitch (M14/5s1)
5. Left front door rotary tumbler microswitch (M14/6s1)
6. Left rear door rotary tumbler microswitch (M14/8s1)
7. Right rear door rotary tumbler microswitch (M14/9s1)
8. Rear-end door handle switch (S88/9)
9. Access aid microswitch for 2nd seat row, right (S159/1) (with model 164.8 with code (845) Electric folding 3rd seat row)
10. Redundant crash signal from restraint systems control unit (N2/7)
11. For code (551) Antitheft alarm system (ATA [EDW]): Alarm horn (H3) (with code (460) Canada version or code (494) USA version) Alarm siren (H3/1) (without code (460) Canada version or without code (494) USA version) ATA [EDW] hood switch (S62)
12. With code (848) electrically adjustable side window: Left vent window obstruction sensor strip (B51/5) Right vent window obstruction sensor strip (B51/6)
13. Model 164 with code (849) Spare tire holder/spare tire: Spare tire carrier "locked" switch (S151/1) Spare tire carrier "open" switch (S151/2) Spare tire carrier control button (S151/3)

Interior CAN

The signals are read in by the rear SAM control unit via the interior CAN.

The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).

Evaluation of input factors

The input factors are evaluated by the integrated microprocessor and the corresponding components are actuated.

Control of systems

1. Rear window defroster
2. Rear window wiper system
3. Antitheft alarm system (with code (551) Antitheft alarm system (ATA [EDW]))
4. Turn signal indicator function (as master)
5. Central locking of right rear door, liftgate, spare wheel carrier (on model 164 with code (849) spare wheel holder/spare wheel) and fuel filler door
6. Liftgate power closing (with code (890) EASY-PACK liftgate)
7. Trailer hitch [trailer hitch] (with code (550) Trailer hitch or code (553) mechanically folding AHV)
8. Left and right rear pop-out window (with code (848) electrically adjustable side window)
9. Rear door illumination
10. Lighting system for rear-end door and luggage compartment

Actuation of components

The actuation of the components takes place via the following connections

1. Direct line
2. Interior CAN

Direct line

The following components are actuated via a direct line

1. Rear door locking unit
2. Left taillights (E3)
3. Right taillights (E4)
4. Left rear door entrance and exit lamp (E17/5)
5. Right rear door entrance and exit lamp (E17/6)
6. Left rear door inside handle illumination (E17/13)
7. Right rear door inside handle illumination (E17/14)
8. Rear rear-end door warning lamp (E17/27)
9. Right trunk lamp (E18/4) (with model 251.0/1)
10. Left trunk lamp (E18/5) (with model 164.8)
11. Left liftgate license plate lamp (E19/3)
12. Right liftgate license plate lamp (E19/4)
13. Center high-mounted stop lamp (E21)
14. Rear-end door ambient lamp (E40/1)
15. Right rear door CL [ZV] motor (M14/9)
16. Fuel filler flap CL [ZV] motor (M14/10)
17. Lumbar pump (M25/1)
18. Model 164.8 as of 1.7.09 with code (877) Ambiance illumination Left front door ambiance illumination (E17/43) Right front door ambiance illumination (E17/44) Left rear door ambiance illumination (E17/45) Right rear door ambiance illumination (E17/46) Center console ambiance illumination (E43/6) Driver instrument panel ambiance illumination (E43/7) Front passenger instrument panel ambiance illumination (E43/8)
19. Model 164 with code (849) Spare tire holder/spare tire: Left additional taillamp (E3/5) Right additional taillamp (E4/5) License plate lamp, left spare tire carrier (E19/5) License plate lamp, right spare tire carrier (E19/6) Central locking motor, spare tire carrier (M14/13)
20. For code (551) Antitheft alarm system (ATA [EDW]): Alarm horn (with code (460) Canada version or code (494) USA version) Alarm siren (without code (460) Canada version or without code (494) USA version)
21. With code (848) electrically adjustable side window: Left vent window motor (M21/8) Right vent window motor (M21/9)
22. With code (550) Trailer hitch AHV or code (553) Mechanically folding AHV: Trailer hitch socket, 13-pin (X58) (without code (460) Canada version or without code (494) USA version) Trailer hitch socket, 7-pin (X58/11) (with code (460) Canada version or with code (494) USA version) LED in the trailer hitch release (A63)

The signals are sent by the rear SAM control unit over the interior CAN.

The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).

Switching of relays

The following relays are switched by the rear SAM control unit

1. Socket circuit 15R relay (with run-on) (F4kK)
2. Trailer circuit 30X relay (F4kL)
3. Heated rear window relay (F4kM)
4. Rear wiper relay (F4kP)
5. Reserve 2 (normally open contact) (F4kT)
6. Trailer relay terminal 30 (F4kU)

Wiring diagram of rear signal acquisition and actuation module (SAM) control unit Model 164, sheet 1 PE54.21-P-2103-97MAA Model 164, sheet 2 PE54.21-P-2103-97MAB Model 164, sheet 3 PE54.21-P-2103-97MAC Model 251, sheet 1 PE54.21-P-2103-97RAA Model 251, sheet 2 PE54.21-P-2103-97RAB

Rear SAM control unit, component description - GF54.21-P-7030RT

MODEL 251.1/0 up to Model Year 8

Scheme 25

Location

The rear SAM control unit is located in the right rear luggage compartment on the wheelhouse.

General

The rear SAM control unit serves to exchange data and is connected to the Controller Area Network bus Class B (interior) (CAN-B).

Task

The rear SAM control unit reads in the following components, sensors and switches and if necessary control their function illumination and switch and controls illumination.

Controlling

1. Vent windows
2. Heated rear window (R1)
3. Rear exterior lights
4. Turn signal functions
5. Central locking of tank cap
6. Right rear door central locking system
7. Central locking, rear-end door
8. Rear-end door power closing
9. Load compartment illumination
10. Trailer recognition and trailer illumination
11. Rear wiper
12. Anti-theft alarm system (ATA) (with code 551 Anti-theft alarm system (ATA))
13. Left and right rear door illumination

Reading in and outputting the following signals

1. Circuit 30
2. Circuit 31
3. Circuit 15
4. Circuit 54

Reading in following switches, pickups and sensors

1. Rear door locking unit (A72)
2. Fuel level sensor, left half of tank (B4/1)
3. Fuel level sensor, right half of tank (B4/2)
4. Right front door rotary tumbler microswitch (M14/5s1)
5. Left front door rotary tumbler microswitch (M14/6s1)
6. Left rear door rotary tumbler microswitch (M14/8s1)
7. Right rear door rotary tumbler microswitch (M14/9s1)
8. Stop light switch (S9/1)
9. Engine hood ATA switch (S62)
10. Rear-end door handle switch (S88/9)
11. Interference filter 1 (A49/1)
12. Alarm signal horn with additional battery (H3/1) (for anti-theft alarm system (ATA [EDW]), code 551)
13. Left vent window obstruction sensor strip (B51/5)
14. Right vent window obstruction sensor strip (B51/6)

Switching in the following relays

1. Socket circuit 15R relay (with run-on) (F4kK)
2. Heated rear window relay (F4kM)
3. Rear wiper relay (F4kP)
4. Trailer circuit 30X relay (F4kL)
5. Circuit 15R relay (F4kR)
6. Front passenger seat adjustment comfort relay (K24/2)

The fuel pump relay (F4kO) is located on the load compartment fuse and relay box (F4), but it is actuated by the ME-SFI [ME] control unit (N3/10)

Switching consumers via semiconductor switches

1. Rear door locking unit
2. Left taillamp (E3)
3. Left turn signal lamp (E3e1)
4. Taillamp and left rear fog lamp (E3e2)
5. Left backup lamp (E3e3)
6. Left stop lamp (E3e4)
7. Right taillamp (E4)
8. Right turn signal lamp (E4e1)
9. Taillamp and right rear fog lamp (E4e2)
10. Right backup lamp (E4e3)
11. Right stop lamp (E4e4)
12. Right luggage compartment lamp (E18/4)
13. Left luggage compartment lamp (E18/5)
14. Left rear-end door license plate lamp (E19/3)
15. Right rear-end door license plate lamp (E19/4)
16. Center high-mounted stop lamp (E21)
17. Alarm signal horn with additional battery (for anti-theft alarm system (ATA [EDW]), code 551)
18. Right rear door CL [ZV] motor (M14/9)
19. fuel filler flap CL [ZV] motor (M14/10)
20. Left vent window motor (M21/8)
21. Right vent window motor (M21/9)
22. Lumbar pump (M25/1)
23. Overall trailer lighting

with code 494 USA version

1. Alarm horn (H3)
2. Electric Brake Control

Trailer recognition

The rear SAM control unit transmits the information for trailer recognition to the PTS control unit (N62) via CAN-B. If a trailer is recognized, the rear PTS is not activated when the transmission is shifted into reverse gear or idle. Otherwise, the trailer would be recognized as an obstacle.

Scheme 26

Shown up to 30.6.09

Shown as of 1.7.09

Scheme 27

Table of contents for function description of instrument cluster (IC) - GF54.30-P-0997GM

MODEL 164.1 as of Model Year 09/Modification Year 08 model refinement package

MODEL 164.8, 251.0/1 as of Model Year 09/Modification Year 08

Table of contents for function description of instrument cluster (IC) - GF54.30-P-0997RT

MODEL 251.1/0 up to Model Year 8

Component description for an engine diagnosis indicator lamp - GF54.30-P-5010V

MODEL 203 with ENGINE 272.920

except CODE (494) USA version

up to Model Year 8

MODEL 211 with ENGINE 272.922 except CODE (494) USA version

MODEL 203 with ENGINE 272.940

except CODE (494) USA version

up to Model Year 8

MODEL 203 with ENGINE 272.941

except CODE (494) USA version

up to Model Year 8

MODEL 171 with ENGINE 272.942

except CODE (494) USA version

up to Model Year 8

MODEL 211, 219 with ENGINE 272.943 except CODE (494) USA version

MODEL 211 with ENGINE 272.944 except CODE (494) USA version

MODEL 251 with ENGINE 272.945

except CODE (494) USA version

up to Model Year 8

MODEL 221 with ENGINE 272.946

except CODE (494) USA version

up to Model Year 8

MODEL 203 with ENGINE 272.960

except CODE (494) USA version

up to Model Year 8

MODEL 171 with ENGINE 272.963

except CODE (494) USA version

up to Model Year 8

MODEL 211, 219 with ENGINE 272.964 except CODE (494) USA version

MODEL 221 with ENGINE 272.965

except CODE (494) USA version

up to Model Year 8

MODEL 230 with ENGINE 272.966

except CODE (494) USA version

up to Model Year 8

MODEL 164, 251 with ENGINE 272.967

except CODE (494) USA version

up to Model Year 8

MODEL 203 with ENGINE 272.970

except CODE (494) USA version

up to Model Year 8

MODEL 211 with ENGINE 272.972 except CODE (494) USA version

MODEL 221 with ENGINE 272.975

except CODE (494) USA version

up to Model Year 8

MODEL 211, 219 with ENGINE 272.985 except CODE (494) USA version

MODEL 221 with ENGINE 273.922

except CODE (494) USA version

up to Model Year 8

MODEL 164 with ENGINE 273.923

except CODE (494) USA version

up to Model Year 8

MODEL 221 with ENGINE 273.924

except CODE (494) USA version

up to Model Year 8

MODEL 211, 219 with ENGINE 273.960 except CODE (494) USA version

MODEL 216, 221 with ENGINE 273.961

except CODE (494) USA version

up to Model Year 8

MODEL 211 with ENGINE 273.962 except CODE (494) USA version

MODEL 164, 251 with ENGINE 273.963

except CODE (494) USA version

up to Model Year 8

MODEL 230 with ENGINE 273.965

except CODE (494) USA version

up to Model Year 8

MODEL 209 with ENGINE 273.967 except CODE (494) USA version

MODEL 221 with ENGINE 273.968

except CODE (494) USA version

up to Model Year 8

MODEL 209 with ENGINE 272.940 except CODE (494) USA version

MODEL 209 with ENGINE 272.960 except CODE (494) USA version

Shows model 171

Scheme 28

Location

The engine diagnosis indicator lamp (engine symbol) is located in the instrument cluster.

Task

To indicate faults in the fuel injection system.

Function

The indicator lamp is actuated by the instrument cluster via a CAN message from the engine control unit. To check the function it lights up with ignition ON and as of an engine speed of approx. 500 RPM for approx. 1 s. If there is no fault, the indicator lamp goes out

Component description for the "CHECK ENGINE" indicator lamp - GF54.30-P-5011V

MODEL 203 with ENGINE 272.920

with CODE (494) USA version

up to Model Year 8

MODEL 211 with ENGINE 272.922 with CODE (494) USA version

MODEL 203 with ENGINE 272.940

with CODE (494) USA version

up to Model Year 8

MODEL 203 with ENGINE 272.941

with CODE (494) USA version

up to Model Year 8

MODEL 171 with ENGINE 272.942

with CODE (494) USA version

up to Model Year 8

MODEL 211, 219 with ENGINE 272.943 with CODE (494) USA version

MODEL 211 with ENGINE 272.944 with CODE (494) USA version

MODEL 251 with ENGINE 272.945

with CODE (494) USA version

up to Model Year 8

MODEL 221 with ENGINE 272.946

with CODE (494) USA version

up to Model Year 8

MODEL 203 with ENGINE 272.960

with CODE (494) USA version

up to Model Year 8

MODEL 171 with ENGINE 272.963

with CODE (494) USA version

up to Model Year 8

MODEL 211, 219 with ENGINE 272.964 with CODE (494) USA version

MODEL 221 with ENGINE 272.965

with CODE (494) USA version

up to Model Year 8

MODEL 230 with ENGINE 272.966

with CODE (494) USA version

up to Model Year 8

MODEL 164, 251 with ENGINE 272.967

with CODE (494) USA version

up to Model Year 8

MODEL 203 with ENGINE 272.970

with CODE (494) USA version

up to Model Year 8

MODEL 211 with ENGINE 272.972 with CODE (494) USA version

MODEL 221 with ENGINE 272.975

with CODE (494) USA version

up to Model Year 8

MODEL 221 with ENGINE 273.922

with CODE (494) USA version

up to Model Year 8

MODEL 164 with ENGINE 273.923

with CODE (494) USA version

up to Model Year 8

MODEL 221 with ENGINE 273.924

with CODE (494) USA version

up to Model Year 8

MODEL 211, 219 with ENGINE 273.960 with CODE (494) USA version

MODEL 216, 221 with ENGINE 273.961

with CODE (494) USA version

up to Model Year 8

MODEL 211 with ENGINE 273.962 with CODE (494) USA version

MODEL 164, 251 with ENGINE 273.963

with CODE (494) USA version

up to Model Year 8

MODEL 230 with ENGINE 273.965

with CODE (494) USA version

up to Model Year 8

MODEL 209 with ENGINE 273.967 with CODE (494) USA version

MODEL 221 with ENGINE 273.968

with CODE (494) USA version

up to Model Year 8

MODEL 209 with ENGINE 272.940 with CODE (494) USA version

MODEL 209 with ENGINE 272.960 with CODE (494) USA version

Shows model 219

Scheme 29

Location

The "CHECK ENGINE" indicator lamp is located in the instrument cluster.

Task

To indicate faults in the fuel injection system

Function

The indicator lamp is actuated by the instrument cluster via a CAN message from the engine control unit. To check the function it lights up with ignition ON and as of an engine speed of approx. 500 RPM for approx. 1 s. If there is no fault, the indicator lamp goes out

Instrument cluster, component description - GF54.30-P-6000GM

MODEL 164.1 (except 164.195) as of Model Year 09/Modification Year 08 model refinement package

MODEL 164.8, 251.0/1 as of Model Year 09/Modification Year 08

Up to 30.6.11 without code (494) USA version

Scheme 30

As of 1.7.11 without code (494) USA version

Scheme 31

Up to 30.6.11 with code (494) USA version

Scheme 32

As of 1.7.11 with code (494) USA version

Scheme 33

Location

The instrument cluster is located in the dashboard on the driver-side.

Task

The instrument cluster has the following tasks

1. Reading in of sensors, pickups and signals
2. Evaluation of input factors
3. Actuation of components
4. Output of warning tones and indicator tones

Reading in of sensors, pickups and signals

The input factors are read in with the following connections

1. Interior CAN (CAN B)
2. Engine compartment CAN (CAN C)

Actuation of components

The instrument cluster directly actuates all internal actuators (e.g. indicator and warning lamps, stepper motors of displays, multifunction display) as well as the instrument illumination.

Output of acoustic and information warnings

The instrument cluster actuates the warning buzzer (A1h1) to issue acoustic and information warnings, which are requested by the systems installed in the vehicle.

The "audible turn signal indicator" is realized by actuating the audible turn signal indicator (A1h2).

Output of signals

the signals are issued over the following connections

1. Interior CAN
2. Engine compartment CAN

Interior CAN

The signals are read-in the instrument cluster over the interior CAN.

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Engine compartment CAN

The signals are read in by the instrument cluster over the engine compartment CAN.

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Evaluation of input factors

The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.

Wiring diagram for instrument cluster (IC) control unit Model 164 PE54.30-P-2101-99MAA Model 251 PE54.30-P-2101-99RAA

Instrument cluster, component description - GF54.30-P-6000RT

MODEL 251.1/0 up to Model Year 8

Scheme 34

Location

The instrument cluster is located in the dashboard on the driver-side.

Task

The instrument cluster displays the dynamic and static status of the vehicle.

It also controls

1. Input/output signals on CAN-B and CAN-C for the various operations, displays and warning messages
2. Illumination of the multifunction display (A1p13) depending on: the brightness buttons +/- the rain/light sensor (B38/2) the phototransistor
3. Outputs to the multifunction display
4. Displaying the time using an analog clock Reading in the brightness buttons +/- Reading in the reset button (R)

The acoustic warning and information signals are output by a speaker that generates the turn signal indicator clicking sound using a relay

1. Flashing "ON" (turn signal indicator clicking sound)
2. Lights ON warning (gong)
3. Parking brake warning (gong tone)
4. Key reminder (gong tone)
5. National vehicle speed warning (gong tone)
6. Door warning (gong tone)
7. Child safety lock (gong tone)
8. Front passenger airbag shutoff by ACSR automatic child seat recognition (gong tone)
9. Seat belt reminder warning (gong tone, audible beep)
10. Engine oil level warning (gong tone)
11. Configurations which can also be set while driving are with the exception of: Switch daytime running lamps on/off Engine oil level measurement Key dependency
12. The instrument cluster actuates the stepper motors of the following analog displays: Tachometer (A1p5) Electronic clock (A1p6) (analog display) Electronic speedometer (A1p8) Fuel supply and reserve indicator (A1p2)

Variants

1. Left-hand drive vehicle
2. Right-hand drive vehicle
3. Instrument cluster with segment display with Distronic (DTR) code 219
4. Instrument cluster without segment display without Distronic (DTR) code 219

National versions

1. National version ECE, Canada, Rest of the World (km) Single scale "km/h" Speedometer ring with 26 sections Segment ring for the speed control systems adapted to the km/h scale (with Distronic (DTR) code 219) Gasoline engine/diesel
2. National version for USA, UK (miles) Single scale "miles" Speedometer ring with 32 sections Segment ring for speed control systems adapted to the miles scale Gasoline engine/diesel

Overview of system components, instrument cluster (IC) component description - GF54.30-P-9996GM

MODEL 164.1 as of model year 2009/CY 08 model refinement package

MODEL 164.8, 251.0/1 as of model year 2009/CY 08

Overview of system components, instrument cluster (IC) component description - GF54.30-P-9996RT

MODEL 251.1/0 up to Model Year 8

Table of contents for function description of trip computer - GF54.50-P-0999RT

MODEL 251.1/0 up to Model Year 8

Setting compass zone, description - GF54.50-P-2014-01GQ

Europe and Africa zone map

Scheme 35

Asia and Australia zone map

Scheme 36

North America zone map

Scheme 37

South America zone map

Scheme 38

Electronic compass component description - GF54.50-P-4102GQ

MODEL 164.1

with CODE (523) MB Audio 20 radio

with CODE (245) Electronic compass

as of Model Year 09/YoM 08 model refinement package

MODEL 164.1

with CODE (510) Audio 20 with CD changer

with CODE (245) Electronic compass

as of Model Year 09/YoM 08 model refinement package

MODEL 164.1

with CODE (525) MB Audio 50 APS radio

with CODE (245) Electronic compass

as of Model Year 09/YoM 08 model refinement package

MODEL 164.1

with CODE (511) Audio 50 APS with DVD changer

with CODE (245) Electronic compass

as of Model Year 09/YoM 08 model refinement package

MODEL 164.8

with CODE (523) MB Audio 20 radio

with CODE (245) Electronic compass

as of Model Year 09/YoM 08

MODEL 164.8

with CODE (510) Audio 20 with CD changer

with CODE (245) Electronic compass

as of Model Year 09/YoM 08

MODEL 164.8

with CODE (525) MB Audio 50 APS radio

with CODE (245) Electronic compass

as of Model Year 09/YoM 08

MODEL 164.8

with CODE (511) Audio 50 APS with DVD changer

with CODE (245) Electronic compass

as of Model Year 09/YoM 08

MODEL 251.0

with CODE (523) MB Audio 20 radio

with CODE (245) Electronic compass

as of Model Year 09/YoM 08

MODEL 251.0

with CODE (510) Audio 20 with CD changer

with CODE (245) Electronic compass

as of Model Year 09/YoM 08

MODEL 251.0

with CODE (525) MB Audio 50 APS radio

with CODE (245) Electronic compass

as of Model Year 09/YoM 08

MODEL 251.0

with CODE (511) Audio 50 APS with DVD changer

with CODE (245) Electronic compass

as of Model Year 09/YoM 08

MODEL 251.1

with CODE (523) MB Audio 20 radio

with CODE (245) Electronic compass

as of Model Year 09/YoM 08

MODEL 251.1

with CODE (510) Audio 20 with CD changer

with CODE (245) Electronic compass

as of Model Year 09/YoM 08

MODEL 251.1

with CODE (525) MB Audio 50 APS radio

with CODE (245) Electronic compass

as of Model Year 09/YoM 08

MODEL 251.1

with CODE (511) Audio 50 APS with DVD changer

with CODE (245) Electronic compass

as of Model Year 09/YoM 08

Illustrated on model 251

Scheme 39

Location

On model 164 and model 251, the electronic compass is located behind the instrument cluster bracket.

Task

1. Self-test
2. Receiving signals
3. Measurement of earth's magnetic field
4. Transmitting signals

Self-test

After the status "circuit 15R ON" has been activated, the electronic compass performs a self-test.

Receiving signals

Discrete lines

1. Power supply via circuit 30 and circuit 31g over one discrete line each

Measurement of earth's magnetic field

The electronic compass measures the direction of the near-earth magnetic field and can then determine the current direction of travel.

When doing so, the electronic compass carries out automatic compensation of disturbance magnetic fields, e.g. caused by the seat heaters (SIH), with code (873) Left and right front seat heater

Transmitting signals

Controller Area Network (data bus/CAN bus) (CAN)

The electronic compass is the subscriber of the interior CAN. The electronic compass sends the direction information cyclically (every t = 1 s) to the instrument cluster via the interior CAN.

Design

1. Magnetic field sensor for measuring orientation of near-earth magnetic field
2. EPROM memory for continual storage of available calibration data and settings

Wiring diagram for compass module control unit Model 164 PE54.30-P-2102-99MAA Model 251 PE54.30-P-2102-99RAA

Electronic compass, component description - GF54.50-P-4102RT

MODEL 251.1/0 up to Model Year 8

Shown as an example on BR 164

Scheme 40

Overview of system components, trip computer (RRE) component description - GF54.50-P-9998RT

MODEL 251.1/0 up to Model Year 8

Scheme 41

Scheme 42

Backup camera (RFK) function description, contents - GF54.65-P-0995GM

MODEL 164.1

as of Model Year 09/Modification Year 08 model refinement package

with CODE (218) Backup camera

except CODE (498) Japan version

MODEL 164.8, 251.0/1

as of Model Year 09/Modification Year 08

with CODE (218) Backup camera

except CODE (498) Japan version

Backup camera (RFK) function description, contents - GF54.65-P-0995GZ

MODEL 164

with CODE (218) Backup camera

except CODE (849) Spare wheel holder/spare wheel

up to Model Year 8

MODEL 251

with CODE (218) Backup camera

up to Model Year 8

Table of contents for PARKTRONIC function description - GF54.65-P-0997GM

MODEL 164.1

as of model year 09/YoM 08 model refinement package

with CODE (220) PARKTRONIC

MODEL 164.8, 251.0/1

as of Model Year 09/Modification year 08

with CODE (220) PARKTRONIC

Parktronic system (PTS), contents, function description - GF54.65-P-0999RT

MODEL 251.1/0

with CODE (220) Parktronic system (PTS)

up to Model Year 8

Driving operation, function - GF54.65-P-3000RT

MODEL 251.1/0

with CODE (220) Parktronic system (PTS)

up to Model Year 8

Scheme 43

Function prerequisite

1. Circuit 15 ON
2. Parking brake not applied

General

The PTS control unit performs a self-test after switching on the ignition (circuit 15 ON). If no malfunctions or faults are present, this is indicated by the standby bar in the center of the warning indicator.

Activate and deactivate Parktronic system (PTS)

The Parktronic system (PTS) can be switched on and off manually via the PTS OFF switch in the upper control panel control unit. When the Parktronic system (PTS) is switched off, the function LED in the PTS OFF switch comes on; the LED is off when the Parktronic system (PTS) is activated

When the ignition is switched on (circuit 15 ON), the Parktronic system (PTS) is automatically activated even when it was deactivated during the previous ignition cycle.

Operation with trailer

When a trailer is connected, the monitoring function at the rear of the vehicle is deactivated. The rear SAM control unit recognizes the trailer connector and sends a corresponding signal to the PTS control unit.

Visual warning

The brightness of the warning indicators is automatically adapted to the ambient light conditions. If the rain/light sensor indicates "Night", the warning indicators are dimmed. Correspondingly, during the "Day" the warning indicators are actuated at full intensity.

Acoustic warning

When an obstacle is approached, an additional acoustic signal is given simultaneously with illumination of the first red LED. This acoustic signal is output intermittently at a frequency of approx. 6 Hz. When the distance to the obstacle decreases to less than 20 cm or 8 inches, the intermittent tone changes to a continuous tone.

When driving, the Parktronic system (PTS) goes to the standby mode at a speed of less than 40 km/h or 25 mph to 16 km/h or 10 mph, i.e. the PTS control unit, the warning indicators and the sensors continue to be supplied with power, however, can not function

Front monitoring range active (selector lever position "D")

Upon dropping below the minimum speed of 16 km/h or 10 mph, the Parktronic system (PTS) is switched to the measuring mode.

When an obstacle is recognized in front of the vehicle, the driver is first notified by a visual signal consisting of various LED's in the driver-side instrument panel PTS warning indicator. When the interval is reduced to a certain level, an additional acoustic warning is given, starting with an intermediate tone and then a continuous tone (see table below).

Front and rear monitoring area active (Selector lever position "R" or "N")

Upon dropping below the minimum speed of 16 km/h or 10 mph, the Parktronic system (PTS) is switched to the measuring mode. When an obstacle is recognized in front of the vehicle, the driver is first notified by a visual signal consisting of various LED's in the driver-side instrument panel PTS warning indicator or in the rear dome lamp PTS warning indicator. When the interval is reduced to a certain level, an additional acoustic warning is given, starting with an intermediate tone and then a continuous tone (see table below).

Upon exceeding the upper speed of 18 km/h or 11 mph, the Parktronic system (PTS) returns to the standby mode

FUNCTION SURVEY FOR PARKTRONIC SYSTEM (PTS)

Key to table

D Drive

N Neutral

P Park position

R Reverse gear

v Speed

v u lower limit speed(16 km/h)

v o upper limit speed (18 km/h)

FUNCTION SURVEY FOR PARKTRONIC SYSTEM (PTS) USA VERSION

Key to table

D Drive

N Neutral

P Park position

R Reverse gear

v Speed

v u lower limit speed (10 mph)

v o upper limit speed (11 mph)

ACTUATION OF DRIVER-SIDE INSTRUMENT PANEL PTS WARNING INDICATOR

ACTUATION OF REAR DOME LAMP PTS WARNING INDICATOR

ACTUATION OF DRIVER-SIDE INSTRUMENT PANEL PTS WARNING INDICATOR (USA VERSION)

ACTUATION OF REAR DOME LAMP PTS WARNING INDICATOR (USA VERSION)

Parktronic system (PTS) control unit, component description - GF54.65-P-5000RT

MODEL 251.1/0

with CODE (220) Parktronic system (PTS)

up to Model Year 8

Scheme 44

Location

The PTS control unit is located under the driver seat.

Task

The PTS control unit takes over the actuation and evaluation of the

1. outer left front PTS ultrasonic sensor (B8/1)
2. center left front PTS ultrasonic sensor (B8/2)
3. Inner left front PTS ultrasonic sensor (B8/3)
4. Inner right front PTS ultrasonic sensor (B8/4)
5. Center right front PTS ultrasonic sensor (B8/5)
6. Outer right front PTS ultrasonic sensor (B8/6)
7. Outer right rear PTS ultrasonic sensor (B8/7)
8. Inner right rear PTS ultrasonic sensor (B8/8)
9. Inner left rear PTS ultrasonic sensor (B8/9)
10. Outer left rear PTS ultrasonic sensor (B8/10)

Discrete inputs and outputs

1. PTS ultrasonic sensors
2. PTS warning indicator, driver side instrument panel (A44/1)
3. PTS warning indicator (rear dome lamp) (A44/3)

The PTS control unit is connected with the Controller Area Network Bus Class B (interior) (CAN-B) for the purpose of data exchange

Inputs via CAN-B

1. Reverse gear signal, intelligent servo module for DIRECT SELECT (A80)
2. Terminal status from EIS [EZS] control unit (N73)
3. Vehicle speed from instrument cluster (A1)
4. Day/night detection by rain/light sensor (B38/2) via overhead control panel control unit (N70)
5. Signal from parking brake indicator switch (S12) from front SAM control unit (N10)
6. Trailer recognition by rear SAM control unit (N10/8)

PARKTRONIC control unit component description - GF54.65-P-5001GM

MODEL 164.8, 251.0/1

as of Model Year 09/Modification year 08

with CODE (220) PARKTRONIC

Illustrated on model 251.1

Scheme 45

Location

The PTS control unit is located below the driver seat.

Task

The PTS control unit has the following tasks

1. Reading in of sensors and signals
2. Evaluation of input factors
3. Actuation of components

Reading in of sensors and signals

The input factors are read in with the following connections

1. Direct line
2. Interior CAN

Direct line

The following signals and sensors are read via a direct line

1. Circuit 30
2. Tml. 31
3. Outer left front PTS ultrasonic sensor (B8/1)
4. Center left front PTS ultrasonic sensor (B8/2)
5. Inner left front PTS ultrasonic sensor (B8/3)
6. Inner right front PTS ultrasonic sensor (B8/4)
7. Center right front PTS ultrasonic sensor (B8/5)
8. Outer right front PTS ultrasonic sensor (B8/6)
9. Outer right rear PTS ultrasonic sensor (B8/7)
10. Inner right rear PTS ultrasonic sensor (B8/8)
11. Inner left rear PTS ultrasonic sensor (B8/9)
12. Outer left rear PTS ultrasonic sensor (B8/10)

Interior CAN

The following signals are read in with interior CAN by the

by the instrument cluster (A1)

1. Vehicle speed
2. Status of PARKTRONIC (model 164 with code (430) Offroad package)

From the front SAM control unit (N10)

1. Status of foot-operated parking brake

By the overhead control panel control unit (N70)

1. Signal "Day" or "Night"

From the upper control panel control unit (N72/1)

1. PTS OFF switch (N72/1s8) (model 164 without code (430) Offroad package, model 251)

by the EZS control unit (N73)

1. Status of circuit 15R

by the central gateway control unit (N93)

1. Wheel speeds and wheel rotation direction
2. Status of reverse gear
3. Drive position

From the rear SAM control unit (N10/8)

1. Trailer recognition (with code (550) Trailer hitch)

Evaluation of input factors

The input factors that have been read in are evaluated by the integrated microprocessor and the affected components are then actuated.

Actuation of components

Components are actuated with the following lines

1. Direct line
2. Interior CAN

Direct line

The following components are actuated via a direct line

1. PTS warning indicator, driver side dashboard (A44/1)
2. Rear dome lamp PTS warning indicator (A44/3)
3. PTS ultrasonic sensors

Interior CAN

The following signal is transmitted via interior CAN

To upper control panel control unit

1. Status of PARKTRONIC for actuating the light-emitting diode integrated in the PTS OFF switch (model 164 without code (430) Offroad package, model 251)

to the instrument cluster

1. Status of PARKTRONIC (model 164 with code (430) Offroad package)
2. Warning issue

Wiring diagram for Parktronic system (PTS) control unit Model 164.8 PE54.65-P-2101-99MAA Model 251 PE54.65-P-2101-99RAA

Sensors, component description - GF54.65-P-5010RT

MODEL 251.1/0

with CODE (220) Parktronic system (PTS)

up to Model Year 08/Modification year 07

Scheme 46

Task

The sensors in the bumpers are transmitters and receivers for the ultrasonic signals necessary for measuring the distance to an obstacle.

Function

When actuated by the PTS control unit (N62), the sensors emit an ultrasonic signal. After a short decay time the sensors are ready to receive. Each sensor receives the echo of its own signal and that of the other sensors. The distance to the obstacle is calculated from the elapsed time between transmission and reception. The monitoring limits can be obtained from the tables below.

ULTRASONIC SENSORS OF FRONT BUMPER

ULTRASONIC SENSORS OF FRONT BUMPER (USA VERSION)

ULTRASONIC SENSORS OF REAR BUMPER

ULTRASONIC SENSORS OF REAR BUMPER (USA VERSION)

Warning indicator, component description - GF54.65-P-5020RT

MODEL 251.1/0

with CODE (220) Parktronic system (PTS)

up to Model Year 8

Scheme 47

Location

The driver-side instrument panel PTS warning indicator is located in the center console at the top.

The rear dome lamp PTS warning indicator is located in the headliner in the dome lamp.

Design

Each warning indicator contains 10 yellow and 4 red LED's, a standby bar, an acoustic signal and a microprocessor. The microprocessor is responsible for bi-directional data exchange with the PTS control unit (N62)

Task

Upon recognizing an obstacle in front or behind the vehicle, the intervals are first indicated visually by illumination of the yellow LED's, then by illumination of the red LED's and, in addition, by output of an acoustic warning to the driver.

After a successful self-test and up to a speed of 18 km/h or 11 mph, the ready state of the Parktronic system (PTS) is indicated to the driver by illumination of the standby bar.

If the Parktronic system (PTS) recognizes a fault during the self-test or while driving, this is indicated to the driver by illumination of both LED's.

Backup camera control unit component description - GF54.65-P-5030GZJ

MODEL 164

with CODE (218) Backup camera

with CODE (498) Japan version

except CODE (849) Spare wheel holder/spare wheel

up to Model Year 8

MODEL 251

with CODE (218) Backup camera

with CODE (498) Japan version

up to Model Year 8

Shown on model 164.1

Scheme 48

Location

The backup camera control unit (N66/2) is located under the left front seat.

Task

1. Performing self-diagnosis after activation
2. Calculation and generation of graphical displays based on steering angle and vehicle data
3. Overlay the camera pictures with the extension lines and transfer them to the COMAND operating, display and controller unit (A40/3) as a Composite Video Baseband Signal (CVBS)
4. Voltage supply for backup camera (B84/3)
5. Voltage supply to passenger-side outside mirror backup camera (B84/6)
6. Data transfer of backup camera status (on/off) to COMAND operating, display and controller unit
7. Storage of last used parking mode (Last Parking Mode)
8. Generate commands to output acoustic warning messages. The warning messages are output via the COMAND operating, display and controller unit.

The backup camera control unit is a user in the Interior CAN and can be diagnosed via the central gateway control unit (N93). The backup camera control unit is always active and operates in the background.

CAN signals

The backup camera control unit is a CAN B subscriber.

Discrete inputs

1. Circuit 30
2. Circuit 31
3. Analog signal (Video In) from backup camera and passenger-side outside mirror backup camera.

Discrete outputs

1. Analog signal (Video Out) from COMAND operating, display and controller unit
2. Voltage supply to backup camera and passenger-side outside mirror backup camera.

Backup camera component description - GF54.65-P-5040GZ

MODEL 164

with CODE (218) Backup camera

except CODE (498) Japan version

except CODE (849) Spare wheel holder/spare wheel

up to Model Year 8

MODEL 251

with CODE (218) Backup camera

except CODE (498) Japan version

up to Model Year 8

Shown on model 164.1

Scheme 49

Location

The backup camera is installed on the left next to the handle for opening the rear-end door.

Task

The entire area surrounding the rear is recorded with the backup camera.

The backup camera is supplied with voltage by the backup camera voltage supply module component (N66/10) after the backup camera system is activated via the COMAND operating, display and controller unit (A40/3).

The backup camera then transmits an analog video picture back to the backup camera voltage supply module component.

The backup camera is a color image camera with wide-angle lens.

Backup camera component description - GF54.65-P-5040GZJ

MODEL 164

with CODE (218) Backup camera

with CODE (498) Japan version

except CODE (849) Spare wheel holder/spare wheel

up to Model Year 8

MODEL 251

with CODE (218) Backup camera

with CODE (498) Japan version

up to Model Year 8

Shown on model 164.1

Scheme 50

Location

The backup camera is installed on the left next to the handle for opening the rear-end door.

The passenger-side outside mirror backup camera is installed in the passenger-side mirror.

Task and function

The entire area surrounding the rear is recorded with the backup camera.

The passenger-side outside mirror backup camera records events in the area that is not visible to the driver.

The camera pictures are processed into a Composite Video Baseband Signal for the backup camera control unit (N66/2).

The backup camera is a color image camera with wide-angle lens.

Overview of PARKTRONIC system components - GF54.65-P-9994GM

MODEL 164.1

as of model year 09/YoM 08 model refinement package

with CODE (220) PARKTRONIC

MODEL 164.8, 251.0/1

as of Model Year 09/Modification year 08

with CODE (220) PARKTRONIC

Reversing camera, (RFK), overview of system components - GF54.65-P-9997GM

MODEL 164.1

with CODE (218) Backup camera

except CODE (498) Japan version

as of Model Year 2009

/Modification year 08 Engineering refinement package

MODEL 164.8, 251.0/1

with CODE (218) Backup camera

except CODE (498) Japan version

as of Model Year 2009

/Modification year 08

Overview of backup camera (RFK) system components - GF54.65-P-9997GZ

MODEL 164

with CODE (218) Backup camera

except CODE (849) Spare wheel holder/spare wheel

up to Model Year 8

MODEL 251

with CODE (218) Backup camera

up to Model Year 8

Overview of system components of Parktronic system (PTS) - GF54.65-P-9998RT

MODEL 251.1/0

with CODE (220) Parktronic system (PTS)

up to Model Year 8

Table of contents for function description, Blind Spot Assist - GF54.71-P-0997GM

MODEL 164.1

with CODE (234) Blind Spot Assist

as of model year 2011

/CY 10

MODEL 164.8, 251.0/1

with CODE (234) Blind Spot Assist

as of Model Year 2011

/Modification year 10 Engineering refinement package

MODEL 164.1

with CODE (234) Blind Spot Assist

as of model year 2011

/CY 10

MODEL 164.8, 251.0/1

with CODE (234) Blind Spot Assist

as of Model Year 2011

/Modification year 10 Engineering refinement package

Overview of system components for Blind Spot Assist - GF54.71-P-9997GM

MODEL 164.1

with CODE (234) Blind Spot Assist

as of model year 2011

/CY 10

MODEL 164.8, 251.0/1

with CODE (234) Blind Spot Assist

as of Model Year 2011

/Modification year 10 Engineering refinement package