Climate Control -- Basic Knowledge -- 215 & 220 Chassis: Component Locations Mercedes-Benz Pullman W221

Air inlet, location - GF83.10-P-2100-01I

Illustrated on model 220

The air inlet (1) is located below the engine hood at the bottom of the windshield.

Identifying Air Inlet Location - Model 220. Scheme 6

Scheme 7

1. The air duct (2) to the windshield/side window defroster outlets is located in the front center under the instrument panel.
2. The air ducts (3, 5, 6, 8) for the side/ door/rear side defroster outlets are located under the instrument panel.
3. The air ducts (4, 7) to the front footwell air outlets are located under the instrument panel.
4. The air ducts (17, 18) to the rear side outlet are located under the front door trim and integrated in the B-pillar trim.
5. The air ducts (9, 10) to the rear outlet are located under the center console and are integrated in the rear area of the center console (on code 582, rear air conditioning only)
6. The air ducts (11, 12) to the rear footwell outlets are located under the center console. The air ducts (13, 14) are routed on the vehicle floor. (Scheme 7): Identifying Air Ducts Components

Scheme 8

1. The air duct (2) to the windshield/side window defroster nozzles is located at the front in the center below the instrument panel.
2. The air ducts (3, 5, 6, 8) for the side and door nozzles are located below the instrument panel.
3. The air ducts (4, 7) to the footwell air outlets are located in the front below the instrument panel.
4. The air ducts (9, 10) to the rear compartment nozzle are located below the center console and are integrated in the rear area of the center console.
5. The air ducts (11, 12) to the rear footwell nozzles are located below the center console. The air ducts (13, 14) run on the vehicle floor to the air outlets (15, 16). (Scheme 8): Identifying Air Ducts Locations

Blower, location - GF83.10-P-2102-01I

Illustrated on model 220

The blower (A32m1) is located below the glove compartment behind the cover (2) for the A/C housing.

Identifying Blower (A32m1) Location - Model 220. Scheme 9

Blower, location - GF83.10-P-2102-01M

The rear blower (M2/1) is located behind the rear A/C housing below the center console.

Identifying Rear Blower (M2/1) Location. Scheme 10

Blower regulator, location - GF83.10-P-2103-02I

Illustrated on model 220

The blower regulator (A32n1) is located beneath the glove compartment behind the cover (2) for the A/C housing and is attached to the blower.

Identifying Dust Filter Location - Model 220. Scheme 11

Blower regulator, location - GF83.10-P-2103-02M

The blower regulator (N29/2) is located at the front on the rear air conditioning housing and is attached to the blower.

Identifying Rear Vent Location - Model 220. Scheme 12

Dust filter, location - GF83.10-P-2104-01I

Illustrated on model 220

The dust filter (1) is located on the A/C housing below the glove compartment.

Rear ventilation, location - GF83.10-P-2105-02I

Illustrated on model 220

The rear vents (1) are located in the rear left and right fenders behind the bumper.

Defroster nozzle, location - GF83.10-P-2106-01I

Illustrated on model 220

The defroster nozzles (1, 2) for the windshield are located at the front of the instrument panel below the windshield.

Identifying Defroster Nozzles - Model 220. Scheme 13

The defroster nozzles (3) for the side windows are located in the instrument panel on the left and right and are integrated into the side nozzles (1).

Identifying Defroster And Side Nozzles - Model 220. Scheme 14

Center nozzle, location/purpose/design/function - GF83.10-P-2107I

MODEL 220, 215

Illustrated on model 220

Design

Identifying Center Nozzle Components - Model 220. Scheme 15

Center nozzle, location - GF83.10-P-2107-02I

Illustrated on model 220

The center nozzle (1) is located in the instrument panel above the center console.

Identifying Center Nozzle Components - Model 220. Scheme 16

Side nozzle, location/purpose/design/function - GF83.10-P-2108I

MODEL 220, 215

Illustrated on model 220

Design

Identifying Defroster And Side Nozzles - Model 220. Scheme 17

Side nozzle, location - GF83.10-P-2108-02I

Illustrated on model 220

The side nozzles (1) are located on the left and right side of the instrument panel.

Front footwell air outlet, location - GF83.10-P-2109-02I

Illustrated on model 220

The front footwell air outlet (1) is located at the bottom of the instrument panel.

Identifying Front Footwell Air Outlet Location - Model 220. Scheme 18

Rear footwell air outlet, location - GF83.10-P-2110-02I

Illustrated on model 220

The rear footwell air outlets (1) are located on the left and right below the front seats.

Identifying Rear Footwell Air Outlet Location - Model 220. Scheme 19

Rear nozzle, location/purpose/design/function - GF83.10-P-2111I

MODEL 220, 215

Illustrated on model 220

Design

Identifying Rear Nozzle Location - Model 220. Scheme 20

Rear nozzle, location - GF83.10-P-2111-02I

Illustrated on model 220

The rear nozzle (1) is located behind the armrest in the center console.

Identifying Rear Nozzle Location - Model 220. Scheme 21

Stowage compartment ventilation nozzle, location - GF83.10-P-2112-02I

Illustrated on model 220

The stowage compartment ventilation nozzle (1) is located in the center console below the armrest.

Identifying Stowage Compartment Ventilation Nozzle Location - Model 220. Scheme 22

Defroster nozzle flap actuator motor, location/purpose/function - GF83.10-P-2129I

MODEL 220, 215

Defroster nozzle flap actuator motor, location - GF83.10-P-2129-01I

Illustrated on model 220

The right defroster nozzle flap actuator motor (M16/14) is located at the side next to the right defroster nozzle air outlet on the A/C housing.

Identifying Right Flap Actuator Motor (M16/14), (M16/20) And (M16/18) Location - Model 220. Scheme 23

The left defroster nozzle flap actuator motor (M16/13) is located on the side next to the left defroster nozzle air outlet on the A/C housing.

Identifying Right Flap Actuator Motor (M16/14), (M16/20) And (M16/18) Location - Model 220. Scheme 24

Diverter flap actuator motor, location/purpose/function - GF83.10-P-2130I

MODEL 220, 215

Diverter flap actuator motor, location - GF83.10-P-2130-01I

Illustrated on model 220

The right center diverter flap actuator motor (M16/18) is located on the side of the A/C housing.

Identifying Right Flap Actuator Motor (M16/14), (M16/20) And (M16/18) Location - Model 220. Scheme 25

The left center diverter flap actuator motor (M16/17) is located on the side of the A/C housing.

Identifying Left Flap Actuator Motor (M16/13), (M16/17) And (M16/19) Location - Model 220. Scheme 26

Blend flap actuator motor, location/purpose/function - GF83.10-P-2131I

MODEL 220, 215

Blend flap actuator motor, location - GF83.10-P-2131-01I

Illustrated on model 220

The right blend flap actuator motor (M16/20) is located on the side of the A/C housing.

The left blend flap actuator motor (M16/19) is located on the side of the A/C housing.

Identifying Left Flap Actuator Motor (M16/13), (M16/17) And (M16/19) Location - Model 220. Scheme 27

Footwell flap actuator motor, location/purpose/function - GF83.10-P-2132I

MODEL 220, 215

Footwell flap actuator motor, location - GF83.10-P-2132-01I

Illustrated on model 220

The left footwell flap actuator motor (M16/15) is located at the bottom left on the A/C housing.

Identifying Left Footwell Flap Actuator Motor (M16/15) Location - Model 220. Scheme 28

The right footwell flap actuator motor (M16/16) is located at the bottom right on the A/C housing.

Identifying Right Footwell Flap Actuator Motor (M16/16) Location - Model 220. Scheme 29

Door vent, location/purpose/function - GF83.10-P-2133I

MODEL 220, 215

Door vent, location - GF83.10-P-2133-01I

Illustrated on model 220

The door vents (1) are located on the inside of the front doors on both sides in the area of the rearview mirror triangle.

Identifying Door Vent Location - Model 220. Scheme 30

Rear compartment side vent, location/purpose/function - GF83.10-P-2134I

MODEL 220

Multifunction sensor, location - GF83.10-P-2135-01I

Illustrated on model 220

The AAC multifunction sensor (B31/1) is located in the right rear fresh air inlet in the engine compartment.

Identifying HVAC Components. Scheme 31

Air inlet, location/function - GF83.10-P-2138I

MODEL 220, 215

Air ducts, location/purpose/design - GF83.10-P-2139I

MODEL 220

Design

Identifying Air Ducts Components. Scheme 32

Air ducts, location/purpose/design - GF83.10-P-2139N

MODEL 215

Design

Identifying Air Ducts Locations. Scheme 33

Blower, location/purpose/function - GF83.10-P-2140I

MODEL 220, 215

Blower, location/purpose/function - GF83.10-P-2140M

MODEL 220 with CODE (582) Rear air conditioning

Blower regulator, location/purpose/function - GF83.10-P-2141I

MODEL 220, 215

Blower regulator, location/purpose/function - GF83.10-P-2141M

MODEL 220 with CODE (582) Rear air conditioning

Dust filter, location/purpose/function - GF83.10-P-2142I

MODEL 220, 215

Rear ventilation, location/purpose/function - GF83.10-P-2143I

MODEL 220, 215

Defroster nozzle, location/purpose/function - GF83.10-P-2144I

MODEL 220, 215

Defroster nozzle, location GF83.10-P-2106-01I Defroster nozzle, purpose The defroster nozzles serve for ventilation and keeping the windshield and side windows from fogging up. Defroster nozzle, function The air supply to the defroster nozzles can be opened and closed using the air distribution switch integrated into the automatic A/C pushbutton control module, which is combined with the auto button ( ). Separate adjustment is not possible. Heated/cool air exits from the defroster nozzles

Scheme 34

Front footwell air outlet, location/purpose/function - GF83.10-P-2145I

MODEL 220, 215

Rear footwell air outlet, location/purpose/function - GF83.10-P-2146I

MODEL 220

Rear footwell air outlet, location/purpose/function - GF83.10-P-2146N

MODEL 215

Stowage compartment ventilation nozzle, location/purpose/function - GF83.10-P-2147I

MODEL 220, 215

Multifunction sensor, location/purpose/function - GF83.10-P-2148I

MODEL 220, 215

Duovalve, location - GF83.20-P-2100-02I

Illustrated on model 220

The duovalves (A31y1, A31y2) are located in the engine compartment at the left rear next to the coolant circulation pump (A31m1).

Identifying Duovalve And Coolant Circulation Pump Location - Model 220. Scheme 35

Duo valve, location - GF83.20-P-2100-02M

The duo valves (A31/1y1, A31/1y2) are located next to the rear air conditioning's coolant recirculation pump (A31/1m1) in the rear right wheelhouse.

Identifying Fresh Air/Recirculated Air Flap Location - Model 220. Scheme 36

Heater core, location - GF83.20-P-2101-02I

The heater core (1) is located behind the instrument panel in the A/C housing.

Identifying Heater Core Location Behind Instrument Panel. Scheme 37

Heater core, location - GF83.20-P-2101-02M

The heater core (1) is located in the rear A/C housing below the armrest of the center console.

Identifying Heater Core Location In Rear A/C Housing. Scheme 38

Coolant circulation pump, location - GF83.20-P-2102-02I

Illustrated on model 220

The coolant circulation pump (A31m1) is located at the right rear in the intermediate component compartment.

Identifying Duovalve And Coolant Circulation Pump Location - Model 220. Scheme 39

Coolant circulation pump, location - GF83.20-P-2102-02M

The coolant circulation pump of the rear air conditioning (A31/1m1) is located in the right rear wheelhouse.

Identifying Duo Valve And Coolant Circulation Pump Location. Scheme 40

Fresh air/recirculated air flap, location/purpose/design/function - GF83.20-P-2104I

MODEL 220, 215

Illustrated on model 220

Design

Fresh air/recirculated air flap, location - GF83.20-P-2104-01I

Illustrated on model 220

The fresh air/recirculated air flap (1, 2) is located behind the instrument panel on the A/C housing.

Identifying Fresh Air/Recirculated Air Flap Location - Model 220. Scheme 41

Duovalve, location/purpose/function - GF83.20-P-2107I

MODEL 220, 215

Duovalve, location/purpose/function - GF83.20-P-2107M

MODEL 220 with CODE (582) Rear air conditioning

Heater core, location/purpose/function - GF83.20-P-2108I

MODEL 220, 215

Heater core, location/purpose/function - GF83.20-P-2108M

MODEL 220 with CODE (582) Rear air conditioning

Coolant circulation pump, location/purpose/function - GF83.20-P-2109I

MODEL 220, 215

Coolant circulation pump, location/purpose/function - GF83.20-P-2109M

MODEL 220 with CODE (582) Rear air conditioning

Air distribution switch, location - GF83.25-P-2101-02I

The air distribution switch is combined with the ( ) button and is located on the automatic A/C pushbutton control module (N22)

Identifying Automatic A/C Pushbutton Control Module And In-Car Temperature Sensor. Scheme 42

Air distribution switch, location/purpose/function - GF83.25-P-2103I

MODEL 220, 215

Air distribution switch, location GF83.25-P-2101-02I Air distribution switch, purpose The air distribution switch is combined with the ( ) button and controls the air to the air outlets for ventilation of the vehicle passenger compartment. Air distribution switch, function GF83.25-P-2101-01I

Fresh air/recirculated air flap actuator motor, location - GF83.30-P-2105-01I

Illustrated on model 220

The fresh air/recirculated air flap actuator motor (M16/21) is located on the right side of the A/C housing between the fresh air and recirculated air flap.

Identifying Fresh Air/Recirculated Air Flap Actuator Motor (M16/21) Location - Model 220. Scheme 43

Activated charcoal filter actuator motor, location - GF83.30-P-2107-02I

Illustrated on model 220

The activated charcoal filter actuator motor (A32/m2) is located at the top of the A/C housing.

Identifying Activated Charcoal Filter Actuator Motor (A32/m2) Location - Model 220. Scheme 44

Activated charcoal filter, location - GF83.30-P-2113-01I

Illustrated on model 220

The activated charcoal filters (1) are located in the A/C housing behind the instrument panel.

Identifying Activated Charcoal Filter Location. Scheme 45

Fresh air/recirculated air flap actuator motor, location/purpose/function - GF83.30-P-2116I

MODEL 220, 215

Activated charcoal filter actuator motor, location/purpose/function - GF83.30-P-2117I

MODEL 220, 215

Activated charcoal filter actuator motor, location GF83.30-P-2107-02I Activated charcoal filter actuator motor, purpose The activated charcoal filter actuator motor actuates the flap for switching on the actuated charcoal filter. Activated charcoal filter actuator motor, function The activated charcoal filter actuator motor is controlled by actuating the activated charcoal filter button ( ) (LED comes on) on the automatic A/C pushbutton control module. This causes the bypass flap in the A/C housing to close, whereby the air sucked in by the blower is purified with certainty by the two activated charcoal filters

Activated charcoal filter, location/purpose/function - GF83.30-P-2118I

MODEL 220, 215

Blower button, location - GF83.40-P-2100-02I

The blower button ( ) is located on the AAC pushbutton control module (N22)

Identifying Automatic A/C Pushbutton Control Module And In-Car Temperature Sensor. Scheme 46

Recirculated air button, location - GF83.40-P-2102-02I

The recirculated air button ( ) is located on the automatic A/C pushbutton control module (N22)

Identifying Automatic A/C Pushbutton Control Module And In-Car Temperature Sensor. Scheme 47

EC button, location - GF83.40-P-2103-02I

The EC button ( ) is in the automatic air conditioning pushbutton control module (N22)

Identifying Automatic A/C Pushbutton Control Module And In-Car Temperature Sensor. Scheme 48

Automatic air conditioning housing, location/purpose/design/function - GF83.40-P-2105I

MODEL 220, 215

Design

Identifying Rear A/C Pushbutton Control Module And Air Distribution Controller. Scheme 49

Automatic air conditioning housing, location - GF83.40-P-2105-01I

Illustrated on model 220

The automatic air conditioning housing (1) is located below the instrument panel.

Identifying Automatic Air Conditioning Housing Location - Model 220. Scheme 50

AUTO button, location - GF83.40-P-2106-02I

The AUTO buttons ( ) are located on the automatic A/C pushbutton control module (N22)

Identifying Pulley Components Location. Scheme 51

AC OFF button, location/task/function - GF83.40-P-2107I

MODEL 220, 215 as of 1.6.01

Identifying A/C Compressor, Control Valve, Pulley And Pressure Relief Valve - Model 220. Scheme 52

AC OFF button, location The AC OFF button ( ) is in the automatic air conditioning pushbutton control module (N22). AC OFF button, task The AC OFF button ( ) is used to switch the air conditioning system on and off. AC OFF button, function GF83.40-P-2107-01IA

REST button, location - GF83.40-P-2109-02I

The REST button ( ) is located on the automatic A/C pushbutton control module (N22)

Identifying Automatic A/C Pushbutton Control Module And In-Car Temperature Sensor. Scheme 53

Activated charcoal filter button, location - GF83.40-P-2113-02I

The activated charcoal filter button ( ) is located on the automatic A/C pushbutton control module (N22)

Identifying In-Car Air Temperature Sensor And Overhead Control Panel Control Module. Scheme 54

Display, location - GF83.40-P-2114-02I

The display is located on the automatic A/C pushbutton control module (N22).

Identifying Automatic A/C Pushbutton Control Module And In-Car Temperature Sensor. Scheme 55

Electric engine/A/C fan, location - GF83.40-P-2118-02I

Illustrated on model 220

The electric engine/A/C fan is located behind the radiator.

Identifying Heat Exchanger Temperature Sensor And A/C Housing. Scheme 56

Condenser, location - GF83.40-P-2120-02I

Illustrated on model 220

The condenser (1) is located behind the radiator grille immediately in front of the radiator.

Identifying Heat Exchanger Temperature Sensor Location. Scheme 57

Evaporator, location/purpose/design/function - GF83.40-P-2121I

MODEL 220, 215

Evaporator, location - GF83.40-P-2121-02I

Illustrated on model 220

The evaporator (1) is located in the A/C housing (2) behind the instrument panel.

Identifying Evaporator Temperature Sensor (B10/6) Location - Model 220. Scheme 58

Receiver/drier, location - GF83.40-P-2122-02I

Illustrated on model 220

The receiver/drier (1) is located in the engine compartment at the front left.

Identifying Receiver/Drier, Refrigerant Temperature And Pressure Sensor Location - Model 220. Scheme 59

Expansion valve, location/purpose/design/function - GF83.40-P-2123I

MODEL 220, 215

Design

Locating Ambient Temperature Display Temperature Sensor - Model 220. Scheme 60

Expansion valve, location - GF83.40-P-2123-02I

Illustrated on model 220

The expansion valve (1) is located in the engine compartment at the left rear.

Identifying Sun Sensor Location. Scheme 61

Refrigerant temperature sensor, location - GF83.40-P-2124-02I

Illustrated on model 220

The refrigerant temperature sensor (B12/1) is located on the receiver/drier (1) in the engine compartment at the front left.

Scheme 62

Climate control coolant temperature sensor, location - GF83.40-P-2125-02I

Illustrated on model 220

The coolant temperature sensor (B11/4) is located at the front on the engine.

Scheme 63

Refrigerant pressure sensor, location - GF83.40-P-2126-02I

Illustrated on model 220

The refrigerant pressure sensor (B12) is located on the receiver/drier (1) in the engine compartment at the front left.

Identifying Receiver/Drier, Refrigerant Temperature And Pressure Sensor Location - Model 220. Scheme 64

Defroster button, location/purpose/function - GF83.40-P-2139I

MODEL 220, 215

Defroster button, location GF83.40-P-2139-01I Defroster button, purpose The defroster button ( ) starts the defrost function. Defroster button, function Model 220 GF83.40-P-2139-02I Model 215 GF83.40-P-2139-02N

Defroster button, location - GF83.40-P-2139-01I

The defroster button ( ) is located on the automatic A/C pushbutton control module (N22)

Scheme 65

ON/OFF button, location/purpose/function - GF83.40-P-2140I

MODEL 220, 215

ON/OFF button, location GF83.40-P-2140-01I ON/OFF button, purpose The ON/OFF button ( ) serves to completely shut off the air conditioning. ON/OFF button, function The ON/OFF button ( ) switches the air conditioning off via the automatic A/C pushbutton control module and closes the fresh air flap. The number "0" appears on the display

ON/OFF button, location - GF83.40-P-2140-01I

The ON/OFF button ( ) is located on the automatic A/C pushbutton control module (N22)

Scheme 66

Temperature button, location/purpose/function - GF83.40-P-2141I

MODEL 220, 215

Temperature button, location GF83.40-P-2141-01I Temperature button, purpose The temperature button ( ) serves for adjusting the desired temperature in the vehicle passenger compartment separately for each side of the car. Temperature button, function GF83.40-P-2141-02I

Temperature button, location - GF83.40-P-2141-01I

The temperature button ( ) is located on the automatic A/C pushbutton control module (N22)

Scheme 67

Center vent electronics control module, location - GF83.40-P-2142-01I

Illustrated on model 220

The center vent electronics control module is permanently integrated into the center vent (1).

Scheme 68

Stepping motor electronic control module, location - GF83.40-P-2143-01I

Illustrated on model 220

The stepping motor electronic control module (N22/5) is located behind the center console and is attached to the front of the A/C housing.

Scheme 69

Blower button, location/purpose/function - GF83.40-P-2144I

MODEL 220, 215

Blower button, function GF83.40-P-2100-01I Blower button, purpose The blower button ( ) serves for switching on the blower for fresh air and recirculated air. Blower button, location GF83.40-P-2100-02I

Recirculated air button, location/purpose/function - GF83.40-P-2145I

MODEL 220, 215

Recirculated air button, location GF83.40-P-2102-02I Recirculated air button, purpose The recirculated air button ( ) serves for actuating the fresh air/recirculated air flap to prevent air entering from outside. Recirculated air button, function Model 220 GF83.40-P-2102-01I Model 215 GF83.40-P-2102-01N

EC button, location/task/function - GF83.40-P-2146I

MODEL 220, 215 up to 31.5.01

EC button, location GF83.40-P-2103-02I EC button, purpose The EC button ( ) is used to switch the air conditioning off and on. EC button, function GF83.40-P-2103-01I

AUTO button, location/purpose/function - GF83.40-P-2147I

MODEL 220, 215

AUTO button, location GF83.40-P-2106-02I AUTO button, purpose The automatic circuit is activated when the AUTO button ( ) is pressed. AUTO button, function When the AUTO button ( ) is pressed the air quantity and air distribution are actuated automatically, separately for each side

REST button, location/purpose/function - GF83.40-P-2148I

MODEL 220, 215

REST button, location GF83.40-P-2109-02I REST button, purpose The REST button ( ) serves for switching the residual engine heat utilization function on and off. REST button, function Model 220 GF83.40-P-2109-01I Model 215 GF83.40-P-2109-01N

Activated charcoal filter button, location/purpose/function - GF83.40-P-2149I

MODEL 220, 215

Activated charcoal filter button, location GF83.40-P-2113-02I Activated charcoal filter button, purpose The activated charcoal filter button ( ) serves for switching on the activated charcoal filter. Activated charcoal filter button, function The activated charcoal filter actuator motor is actuated with the activated charcoal filter button ( ) This closes the bypass flap in the A/C housing so that the air sucked in by the blower is purified as it passes through the two activated charcoal filters

Display, location/purpose/function - GF83.40-P-2150I

MODEL 220, 215

Electric engine/air conditioning fan, location/task/function - GF83.40-P-2151I

MODEL 220, 215

Condenser, location/purpose/function - GF83.40-P-2152I

MODEL 220, 215

Receiver/drier, location/purpose/function - GF83.40-P-2153I

MODEL 220, 215

Refrigerant temperature sensor, location/purpose/function - GF83.40-P-2154I

MODEL 220, 215

Air conditioning coolant temperature sensor, location/purpose/function - GF83.40-P-2155I

MODEL 220, 215

Refrigerant pressure sensor, location/purpose/function - GF83.40-P-2156I

MODEL 220, 215

Center nozzle electronic control module, location/purpose - GF83.40-P-2157I

MODEL 220, 215

Stepper motor electronics control module, location/task - GF83.40-P-2158I

MODEL 220, 215

The stepper motor electronics control module controls the following 10 stepper motors on the air conditioning box

Identifying Stepper Motor Electronics Control Module Components Location. Scheme 70

Survey of automatic air conditioning (AAC) system componentry, location/task/design/function - GF83.40-P-9990I

MODEL 220

Automatic air conditioning system component summary, location/purpose/design/function - GF83.40-P-9990N

MODEL 215

Rear air conditioning air distribution flap actuator motor, location/purpose/function - GF83.50-P-2100M

MODEL 220 with CODE (582) Rear air conditioning

Rear air conditioning air distribution flap actuator motor, location - GF83.50-P-2100-01M

The rear air conditioning air distribution flap actuator motor (M16/22) is located on the side of the rear A/C housing below the center console.

Identifying Rear Air Conditioning Air Distribution Flap Actuator Motor (M16/22) Location. Scheme 71

Rear air conditioning air distribution control, location/purpose/function - GF83.50-P-2101M

MODEL 220 with CODE (582) Rear air conditioning

Rear air conditioning air distribution control, location - GF83.50-P-2101-01M

The rear air conditioning air distribution control (1) is located on the rear A/C pushbutton control module (N22/3).

Identifying Rear A/C Pushbutton Control Module And Air Distribution Controller. Scheme 72

Rear air conditioning housing, location - GF83.50-P-2102-01M

The rear A/C housing (1) is located below the armrest in the center console.

Scheme 73

Rear air conditioning refrigerant shutoff valve, location/purpose/function - GF83.50-P-2103M

MODEL 220 with CODE (582) Rear air conditioning

Rear air conditioning refrigerant shutoff valve, location - GF83.50-P-2103-01M

The rear A/C refrigerant shutoff valve (Y67) is located in the wheelhouse at the front left below the wheelhouse paneling.

Identifying Rear Air Conditioning Refrigerant Shutoff Valve Location. Scheme 74

Rear air conditioning blower button, location/purpose/function - GF83.50-P-2105M

MODEL 220 with CODE (82) Rear air conditioning

Rear air conditioning blower button, location GF83.50-P-2105-01M Rear air conditioning blower button, purpose The blower button ( ) serves for switching on the rear blower. Rear air conditioning blower button, function GF83.50-P-2105-02M

Rear air conditioning blower button, location - GF83.50-P-2105-01M

The blower button ( ) is located on the rear A/C pushbutton control module (N22/3)

Rear air conditioning temperature button, location/purpose/function - GF83.50-P-2106M

MODEL 220 with CODE (582) Rear air conditioning

Rear air conditioning temperature button, location GF83.50-P-2106-01M Rear air conditioning temperature button, purpose The temperature buttons ( ) serve for setting the desired temperature in the rear passenger compartment separately for each side of the car. Rear air conditioning temperature button, function GF83.50-P-2106-02M

Rear air conditioning temperature button, location - GF83.50-P-2106-01M

The temperature buttons ( ) are located on the rear A/C pushbutton control module (N22/3)

Identifying Rear A/C Pushbutton Control Module And Air Distribution Controller. Scheme 75

Rear air conditioning REST button, location/purpose/function - GF83.50-P-2107M

MODEL 220 with CODE (582) Rear air conditioning

Rear air conditioning REST button, location GF83.50-P-2107-01M Rear air conditioning REST button, purpose The REST button ( ) serves for switching the residual engine heat utilization function for the rear passenger compartment on and off. Rear air conditioning REST button, function GF83.50-P-2107-02M

Rear air conditioning REST button, location - GF83.50-P-2107-01M

The REST button ( ) is located in the rear A/C pushbutton control module (N22/3)

Scheme 76

Rear air conditioning display, location/purpose/function - GF83.50-P-2109M

MODEL 220 with CODE (582) Rear air conditioning

Rear air conditioning display, location - GF83.50-P-2109-01M

The rear air conditioning display is located on the rear A/C pushbutton control module (N22/3).

Identifying Rear A/C Pushbutton Control Module And Air Distribution Controller. Scheme 77

Rear air conditioning ON/OFF button, location - GF83.50-P-2110-01M

The ON/OFF button ( ) is located at the top left on the rear A/C pushbutton control module (N22/3)

Scheme 78

Rear air conditioning evaporator, location/purpose/function - GF83.50-P-2111M

MODEL 220 with CODE (582) Rear air conditioning

Rear air conditioning evaporator, location - GF83.50-P-2111-01M

The rear air conditioning evaporator (6) is located in the rear A/C housing.

Identifying Rear Air Conditioning Evaporator Location. Scheme 79

Refrigerant injection valve, location - GF83.50-P-2113-01M

The refrigerant injection valve (1) is located in the feed line to the refrigerant shutoff valve (Y67)

Scheme 80

Rear air conditioning box, location/task/design/function - GF83.50-P-2117M

MODEL 220 with CODE (582) Rear air conditioning

Design

Identifying Rear Air Conditioning Box Components Location/Design. Scheme 81

Refrigerant compressor injection valve, location/purpose - GF83.50-P-2118M

MODEL 220 with CODE (582) Rear air conditioning

Rear air conditioning ON/OFF button, location/purpose - GF83.50-P-2119M

MODEL 220 with CODE (582) Rear air conditioning

Rear air conditioning ON/OFF button, location GF83.50-P-2110-01M Rear air conditioning ON/OFF button, purpose The ON/OFF button ( ) switches the rear air conditioning off via the rear A/C pushbutton control module and shuts off the rear refrigerant circuit via the refrigerant shutoff valve

A/C compressor, location/purpose/design/function - GF83.55-P-2100I

ENGINE 112, 113, 137, 613 as of 1.9.99 in MODEL 220 A/C compressor 7SE16C

ENGINE 113, 137 in MODEL 215 A/C compressor 7SE16C

Design

Scheme 82

1. A total of seven pistons (6) with the same pitch are connected around the circumference of the swash plate (4) by means of sliders (10).
2. The swash plate (4) is connected to the stop plate (12) in the crankcase (2) by two guide pins (3) and mounted flexibly on the A/C compressor shaft (13).
3. The stop plate (12) and pulley (1) are permanently mounted on the A/C compressor shaft (13).
4. The externally actuated A/C compressor control valve (8) for adjustment of the swash plate (4) is located in the rear section of the housing. see scheme 123: Identifying A/C Compressor Components

A/C compressor, location - GF83.55-P-2100-01I

Illustrated on model 220

The A/C compressor (A9) is attached to the engine at the front left.

Scheme 83

Identifying A/C Compressor Components. Scheme 84

Function Operation

The rotary motion of the pulley (1) is transferred by the A/C compressor shaft (13) to the stop plate (12) which is permanently connected to the A/C compressor shaft (13) with a pressed fit. The rotation of the stop plate (12) is transferred to the pivoting swash plate (4) by an articulated mechanism. The conversion of the swash plate rotation to an oscillating motion is accomplished by two sliders (10) between the piston (6) and swash plate (4). Six pistons (6) with the same pitch are connected at the circumference of the swash plate (4). Damping reservoirs on the pressure side (5) and intake side (7) reduce the gas pulsation in the A/C compressor by providing for a uniform refrigerant flow. This helps avoid noises in the compression process.

Volume control mechanism

The A/C compressor volume is changed between 2 % (minimum stroke volume) and 100 % (max. stroke volume) by the control flow via the externally controlled A/C compressor control valve (8). The appropriate control flow is given to the A/C compressor control valve (8) via the automatic A/C pushbutton control module depending on the refrigeration requirement.

The refrigeration requirement is determined primarily by the temperature setting for the vehicle passenger compartment and the value measured by the in-car temperature sensor.

The swash plate position and therefore the variable stroke volume is determined by the crankcase pressure, the diaphragm pressure in the A/C compressor control valve (approx. 2 bar) and the intake pressure as a function of the thermal load in the air conditioning system by measuring, processing and evaluating the control variables/parameters in the air conditioning system. A change in the intake pressure depending on the control flow at the A/C compressor control valve (8) causes a change in the crankcase pressure and therefore the swash plate position either in the direction of max. stroke volume (intake pressure = crankcase pressure; control flow = max.) or variable stroke volume (crankcase pressure > intake pressure; control flow between min. switch-on flow rate and max. control flow, i.e. min. switch-on flow < control flow < max. control flow).

Regulation of A/C compressor output depending on humidity

The A/C compressor output is regulated in relation to humidity measured by the multifunction sensor as follows

Humid outdoor air

If the outdoor air is humid the A/C compressor operates at max. output, i.e. the evaporator temperature is cold (approx. 2°C), so that the air is dried to a high degree.

In the heater mode the air is reheated as required in the heater core.

Dry outdoor air

If the outdoor air is dry the A/C compressor operates at lower output, i.e. the evaporator temperature can then be up to approx. 14°C when the required air exit temperature is not lower.

Air conditioning OFF

If the air conditioning is switched off with the automatic A/C pushbutton control module or the EC button (control current on control valve = 0), the A/C compressor control valve (8) is opened completely. This allows refrigerant to flow unimpeded into the crankcase (2) to the high pressure side leading to an extremely rapid increase in the crankcase pressure. The coil element (10) for closing the A/C compressor moves to the right against the valve plate (9) until the refrigerant flow is shut off completely on the intake side. The coil element (10) is designed so that the refrigerant flow is interrupted by closing the intake passage at a flow rate of < 5 cm 3 even when the A/C compressor is switched on.

Internal A/C compressor lubrication with air conditioning switched off

The A/C compressor (7SE16C) has an internal lubrication circuit to ensure supply of lubrication oil to the parts moving mechanically in relation to one another such as the slider/swash plate, front and rear radial shaft bearing and piston/cylinder sleeve. The lubrication is ensured by minimum A/C compressor output volume. This output volume is regulated by the A/C compressor control valve (1) and the valve (2) controlled by spring force. The minimum A/C compressor output volume of 2 % with the A/C compressor OFF ensures that refrigerant with the compressor oil located in the crankcase is transported through the hollow A/C compressor shaft (P c --> P s ).

The refrigerant/refrigeration oil mixture enters into the crankcase on the intake side, is compressed and then pumped into the air conditioning circuit on the output side (P s --> P d ). From the output side the refrigerant/compressor oil mixture flows back through the open passage in the control valve (P d --> P c open) into the crankcase.

Scheme 85

A/C compressor control valve, location/purpose/function - GF83.55-P-2102I

ENGINE 112, 113, 137, 613 as of 1.9.99 in MODEL 220 A/C compressor 7SE16C

ENGINE 113, 137 in MODEL 215 A/C compressor 7SE16C

A/C compressor control valve, location - GF83.55-P-2102-01I

Illustrated on model 220

The control valve (1) is located on the A/C compressor (A9).

Scheme 86

Scheme 87

Function

Variable volume control in partial load range

( e.g. at low ambient temperature or low refrigeration requirement) The refrigeration requirement is always dependent on the intake side, i.e.

If the intake pressure (P s ) drops below the diaphragm pressure (P s1 ) in the A/C compressor control valve and the control current is simultaneously reduced, the passage P d to P c in the A/C compressor control valve is opened by the control piston (2). This allows refrigerant to flow from the high pressure side (P d ) into the crankcase, increasing the pressure in the crankcase (P c ).

The total of the forces on the left side is open from the crankcase pressure (P c ), return force of the swash plate (centrifugal force) and spring return force is therefore greater than the sum of the piston forces. This causes the swash plate to move to the upright position reducing the piston stroke or displacement volume.

In addition the refrigeration control is dependent on the humidity, i.e.

At high humidity the control valve is actuated externally (PWM-signal) resulting in an increase in the refrigeration output (reduction of window fogging).

At an output rate less than 5 cm 3 the A/C compressor is switched off automatically.

Scheme 88

Function

Control at max. stroke volume

(e.g. at high ambient temperature or refrigeration requirement)

If the intake pressure (P s ) increases above the diaphragm pressure (P s1 ) in the A/C compressor control valve and the control current is increased simultaneously, passage P to P in the A/C compressor control valve is closed by the control piston (2). The crankcase pressure (P c ) decreases, because refrigerant cannot flow from the high pressure side (P d ) through the A/C compressor control valve into the crankcase.

The bypass (1) allows long-term pressure compensation between the intake housing and crankcase (P s = P c ), i.e. the reaction force on the left side consisting of the crankcase pressure (P c ), return force of the swash plate (centrifugal force) and spring return force is therefore less than the sum of the piston forces. The swash plate angle increases from the "0 position", i.e. the angle increases continuously up to the mechanical limitation of the swash plate against the stop plate. The piston stroke increases linearly in relation to the angle of the swash plate up to the max. output volume.

Pulley, location/purpose/design/function - GF83.55-P-2103I

ENGINE 112, 113, 137, 613 as of 1.9.99 in MODEL 220 A/C compressor 7SE16C

ENGINE 113, 137 in MODEL 215 A/C compressor 7SE16C

Pulley, location - GF83.55-P-2103-01I

Illustrated on model 220

The pulley (2) is located at the front of the drive shaft on the A/C compressor (A9).

Pressure relief valve, location/purpose/function - GF83.55-P-2104I

ENGINE 112, 113, 137, 613 as of 1.9.99 in MODEL 220 A/C compressor 7SE16C

ENGINE 113, 137 in MODEL 215 A/C compressor 7SE16C

Pressure relief valve, location - GF83.55-P-2104-01I

Illustrated on model 220

The pressure relief valve (3) is located on the A/C compressor (A9).

Scheme 89

In-car temperature sensor with aspirator blower, location - GF83.57-P-2100-01I

Illustrated on model 220

The in-car air temperature sensor with aspirator blower (N70b1) is located in the overhead control panel control module (N70).

The in-car air temperature sensor with aspirator blower (N70b1) is located in the AAC pushbutton control module (N22).

Heat exchanger temperature sensor, location - GF83.57-P-2101-02I

Illustrated on model 220

The left heat exchanger temperature sensor (B10/2) and right heat exchanger temperature sensor (B10/3) are located on the A/C housing (1).

Heat exchanger temperature sensor, location - GF83.57-P-2101-02M

The heat exchanger temperature sensors (B10/9, left, B10/10, right) are located on the rear A/C housing at the left and right rear.

Evaporator temperature sensor, location - GF83.57-P-2102-01I

Illustrated on model 220

The evaporator temperature sensor (B10/6) is located in the air flow behind the evaporator in the A/C housing.

Evaporator temperature sensor, location - GF83.57-P-2102-01M

The evaporator temperature sensor (B10/11) is located on the rear A/C housing on the left.

Identifying Evaporator Temperature Sensor (B10/11) Location. Scheme 90

Outside temperature sensor, location/task/design/function - GF83.57-P-2103S

MODELS 215, 220

Shown on MODEL 220

Outdoor temperature sensor, location - GF83.57-P-2103-02I

Illustrated on model 220

The outdoor temperature sensor (B14) is located in the bumper in the front left.

Identifying Outside Air Temperature Sensor. Scheme 91

Sun sensor, location - GF83.57-P-2104-02I

Illustrated on model 220

The sun sensor (B32/2) is located in the center of the air inlet in the engine hood.

In-car temperature sensor with aspirator blower, location/purpose/function - GF83.57-P-2107I

MODEL 220, 215

Heat exchanger temperature sensor, location/purpose/function - GF83.57-P-2108I

MODEL 220, 215

Heat exchanger temperature sensor, location/purpose/function - GF83.57-P-2108M

MODEL 220 with CODE (582) Rear air conditioning

Evaporator temperature sensor, location/purpose/function - GF83.57-P-2109I

MODEL 220, 215

Evaporator temperature sensor, location/purpose/function - GF83.57-P-2109M

MODEL 220 with CODE (582) Rear air conditioning

Outdoor temperature sensor, location/purpose/function - GF83.57-P-2110I

MODEL 220, 215

Sun sensor, location/purpose/function - GF83.57-P-2111I

MODEL 220, 215