Lights - Service Techniques BMW X5 E70

Scheme 68

INTRODUCTION

Prior to the introduction of the roof control panel, the wiring in the roof was extremely complex.

Individual lines were required for the following functions

1. Interior lighting (front and rear)
2. Sliding/tilting sunroof
3. Anti-theft alarm system
4. Lighting for make-up mirrors
5. Electrochromic interior mirror with connection for electrochromic exterior mirrors
6. Rain-light sensor or rain-light solar sensor
7. Condensation sensor

Both basic and High variants of the roof control panel are available.

The High variant of the roof control panel is fitted in conjunction with specific optional equipment: e.g. sliding/tilting sunroof or with option 563 "Lighting kit".

The roof control panel optimizes the wiring in the roof as follows

1. The roof control panel is the interface for the wiring in the roof.
2. The roof control panel also features other components, depending on the equipment fitted and the national version: Sliding/tilting sunroof switch Emergency call button Microphone Indicator lamp for front-passenger airbag deactivation Ultrasonic interior motion sensor (E70 only)

This summary of wires and components in the roof control panel optimizes the previous construction.

1. > E81, E87, E90, E91, E92, E93

1. > E70

BRIEF DESCRIPTION OF COMPONENTS

1. Basic variant on basic version The basic variant of the roof control panel does not have its own control unit. It comprises the following components: Interior light, front Rear interior light (not E93) These two lights are activated via the footwell module.
2. High variant The High variant of the roof control panel has its own control unit. The FZD control unit (FZD: roof control panel). The High version of the roof control panel contains the following components, depending on the equipment fitted and the national version: Interior light, front Reading light, front (for driver's side and passenger side) Rear interior light Reading light, rear (left and right) Switch for sliding/tilting sunroof Microphone for telephone and emergency call Emergency call button Indicator lamp for front-passenger airbag deactivation Ultrasonic interior motion sensor (E70 only) > E81, E87, E90, E91, E92 > E93 > E70

The roof control panel is available in several colors to match the headliner. Due to the number of equipment specifications, there are a total of 62 variants of the roof control panel (E70: 68; E93: 4).

The following components send input signals to the FZD control unit in the High variant of the roof control panel

1. 3 interior-light switches The interior light and the reading lights are switched on and off via 3 switches.
2. Light switch Switching Terminal R on and setting the light switch to switch position "A" or "2" also switches on the top-light.
3. Sliding/tilting sunroof switch The sliding/tilting sunroof switch is used to open and close the sliding/tilting sunroof and to tilt it upwards.
4. Hall sensors in the sunroof drive The Hall sensors in the sliding/tilting sunroof drive indicate the position of the sliding/tilting sunroof to the FZD control unit (in the roof control panel). > E70, E91 The E70, E91 have 2 drives, each with 2 Hall sensors: 2 Hall sensors report the position of the glass sliding/tilting sunroof and the glass tilting roof (Panorama glass roof) 2 Hall sensors report the position of the sliding visor and the wind deflector. > E91 with Panorama glass sunroof The E91 with Panorama glass sunroof has its own control unit for the Panorama glass sunroof (SHD: sliding/tilting sunroof). The Hall sensors report to the SHD control unit.
5. Wiper/washer system The position of the windscreen wiper switch is reported to the rain-light sensor or rain-light solar sensor via the FZD control unit. The rain-light sensor or rain-light solar sensor is activated by the "automatic wipe" button.
6. Condensation sensor > Only vehicles with IHKA: integrated automatic heating and air-conditioning system The condensation sensor measures the moisture on the windscreen in the vehicle interior. The condensation sensor is able to detect condensation on the windscreen before it becomes visible. The condensation sensor is only active in the automatic program. The condensation sensor draws its power supply from the roof control panel. The roof control panel evaluates the condensation sensor data. The roof control panel sends appropriate data to the IHKA control unit (via the K-CAN). On receiving this data, the IHKA control unit starts the windscreen demisting program.
7. Electrochromic rear-view mirror If a strong light beam hits the electrochromic interior mirror, the electrochromic interior mirror sends an analogue signal to the FZD control unit. The FZD control unit controls the dimming of the electrochromic interior mirror. The electrochromic mirror glass darkens. In addition, the FZD control unit also converts the analogue signal into a CAN message. The CAN message is sent on the K-CAN, triggering the darkening of the electrochromic exterior mirror (optional equipment). The occupants of the vehicle are not dazzled by reflected light beams.
8. Ultrasonic interior motion sensor The ultrasonic interior motion sensor is a sensor for the anti-theft alarm system (DWA). The ultrasonic interior motion sensor is able to detect movements in the vehicle interior via ultrasonic signals. If the anti-theft alarm system is activated and movement is detected in the vehicle interior, an alarm is triggered. > E70 The ultrasonic interior motion sensor is integrated in the FZD control unit. > E81, E87, E90, E92 and E91 without Panorama glass roof The ultrasonic interior motion sensor is integrated in the rear interior light. > E91 with Panorama glass sunroof The ultrasonic interior motion sensor is installed at the FZD control unit.
9. Selector lever or shift lever in the center console If reverse gear is engaged, the electrochromic mirrors will not be dimmed.
10. Power supply from the distributor in the junction box The roof control panel draws its power supply from the distributor in the junction box. > E81, E87, E90, E91 E92 3 positive cables connect the distributor in the junction box to the roof control panel: Terminal 15 Terminal 30 Terminal 30g, not E91 with option 402 "Panorama glass roof" > E93 2 positive cables connect the distributor in the junction box to the roof control panel: Terminal 15 Terminal 30 > E70 3 positive wires lead from the power distributor in the junction box and from the rear power distributor to the roof control panel: Terminal 15 from rear power distributor Terminal 30g with option 402 "Panorama glass roof" from rear power distributor, without option 402 "Panorama glass roof" from power distributor in the junction box, Terminal 30 from power distributor in the junction box The junction box houses a distributor and a control unit. The control unit is called the junction box electronics. The junction box electronics (JBE control unit) is the data interface for the following data buses: K-CAN (body CAN) PT-CAN (powertrain CAN) Diagnosis wire The signals from the F-CAN (Chassis CAN) are simply looped through the junction box. This means that the signals from the F-CAN are not received and processed by the JBE control unit. The F-CAN cables are simply routed through the junction box housing.

The following control units are associated with the FZD control unit (depending on the equipment)

1. CAS: Car Access System The CAS (Car Access System) control unit supplies the terminal status Terminal R ON. The CAS control unit is connected to the FZD control unit via the K-CAN. The CAS control unit supplies the "convenience closing" or "convenience opening" message for the sliding/tilting sunroof. > E93 The CAS control unit is connected to the DWA control unit via the K-CAN (DWA control unit: siren with tilt alarm sensor and integrated DWA software)
2. CA: Comfort Access The CA (Comfort Access) control unit supplies the "convenience closing" or "convenience opening" message for the sliding/tilting sunroof. The request is sent when the outside door handle is pressed for longer than 2 seconds. Comfort Access is connected to the FZD control unit via the K-CAN.
3. DWA: Anti-theft alarm system For the DWA control unit, the FZD control unit is the interface to the K-CAN. The DWA control unit receives messages about the doors and engine hood as well as the boot lid (e.g. closed, open) via the K-CAN. The DWA control unit evaluates the signals from the ultrasonic interior motion sensor. The messages from the DWA are looped through the roof control panel. This means that the cables for the anti theft alarm system are routed through the roof control panel housing. Messages from the DWA control unit are fed via a direct wire to the DWA LED. The DWA control unit is connected to the siren with tilt alarm sensor via the K-bus. > E93 DWA control unit: siren with tilt alarm sensor and integrated DWA software The software for the DWA is integrated in the siren with tilt alarm sensor. > E70 DWA control unit: FZD control unit with integrated DWA software The DWA LED is actuated directly by the FZD.
4. EGS: Electronic transmission control The EGS control unit supplies the "Reverse gear engaged" message for the electrochromic interior mirror (with automatic transmission). Signal path: EGS (electronic transmission control) -> PT-CAN -> Junction box electronics (JBE) in junction box -> K-CAN -> FZD (roof control panel). If reverse gear is engaged, the electrochromic mirrors will not be dimmed.
5. FRM: Footwell module The footwell module (FRM) controls the interior and exterior lighting but not the reading light. The reading light is controlled by the roof control panel. The FRM control unit is connected to the roof control panel via the K-CAN.
6. IHKA: Integrated automatic heating and air-conditioning system The IHKA control unit receives the signals from the condensation sensor via the FZD control unit. The IHKA control unit is connected to the FZD control unit via the K-CAN.
7. KOMBI: Instrument cluster The instrument cluster control unit in the instrument cluster sends messages to the FZD control unit, e.g. regarding the dimming of the instrument lighting. The FZD control unit dims e.g. the LED in the sliding/tilting sunroof switch. The instrument cluster control unit also receives messages from the FZD control unit: e.g. the FZD control unit will send a message to the instrument cluster control unit when the anti-trap circuit on the sliding/tilting sunroof is triggered. The instrument cluster control unit then converts this message to a Check-Control message in the vehicle's system. The instrument cluster control unit is connected to the FZD control unit via the K-CAN.
8. RLS / RLSS: rain-light sensor / rain-light solar sensor The rain-light sensor or rain-light solar sensor is like the condensation sensor in the base of the electrochromic interior mirror. The RLS or RLSS detects water on the windscreen and the ambient brightness. The solar sensor in the RLSS also records the presence of light or heat sources (e.g. direct sunlight), which could affect the climate in the vehicle interior. The signals from the RLS or RLSS are used to control the wiper function and for automatic driving lights control. With the RLSS, the signals from the solar sensor are also used to control the functions of the air conditioning. The RLS or RLSS is a self-diagnosing control unit. The RLS or RLSS is connected by a LIN bus to the roof control panel (LIN: Local Interconnect Network, i.e. local data bus).
9. SZL: Steering Column Switch The SZL control unit sends signals to the FZD control unit, e.g. from the wiper switch. The SZL control unit is on the F-CAN (Chassis CAN). Data is transmitted to the K-CAN via a number of data buses and control units. Signal path: SZL -> F-CAN -> Junction box (merely looped through) -> F-CAN -> DSC (Dynamic Stability Control) -> PT-CAN -> JBE control unit in junction box -> K-CAN -> FZD -> Rain-light sensor or rain-light solar sensor.

In the High variant of the roof control panel, the following components are controlled by the FZD control unit

1. Interior lighting, front The interior lighting includes the interior lights and the reading lights, left and right. Front interior light The light source for the front interior light is a 6 W xenon lamp. Reading light for driver's side and passenger side There is one reading lamp each on the right and on the left. The light source for the reading lamp is a 6 W xenon lamp. LEDs for top-light The top-light comprises 2 orange LEDs.
2. Lighting for the make-up mirrors The lighting for the make-up mirror comes on automatically whenever the sliding visor for the make-up mirror is opened (regardless of whether or not the interior lighting is switched on). There is a make-up mirror on the driver's side and on the passenger side.
3. Rear interior light The rear interior light is activated by the FZD control unit as follows: On the basic variant of the rear interior light, the rear interior lighting is switched on together with the lighting in the front of the vehicle. The rear interior light in the basic variant does not have its own switch. The rear interior light is switched on by the FZD control unit. On the High variant, the signals from the rear interior lighting buttons are sent to the FZD control unit. The FZD control unit activates the required lights. The top-light is activated by the FZD control unit whenever the exterior lights are switched on. > E81, E87, E90, E91, E92 The following variant-specific versions of the rear-compartment interior light are available: Basic variant rear interior light The basic variant, the rear interior light simply provides interior light. Rear interior light on the basic variant with cover for the ultrasonic interior motion sensor On the basic variant with ultrasonic interior motion sensor, the ultrasonic interior motion sensor is fitted in the rear interior light. High variant rear interior light On the High variant, the rear interior light provides both interior lighting and reading lights on the left and right. High variant rear interior light with cover for ultrasonic interior motion sensor On the High variant with ultrasonic interior motion sensor, the rear-compartment interior light features the ultrasonic interior motion sensor in addition to the interior lighting and reading lights. > E70 and E91 with Panorama glass roof The ultrasonic interior motion sensor is located in the FZD (E70) or on the FZD (E91 with Panorama glass roof). > E70 and E91 with Panorama glass roof The E70, E91 has 2 rear interior lights: on the C-pillar left and right.
4. Sliding/tilting sunroof drive > E87, E90, E92 The FZD control unit actuates the sliding/tilting sunroof drive (dependent on the sliding/tilting sunroof switch or central locking system). > E70 The FZD control unit controls 2 drives. One drive operates the two glass roofs (Panorama glass roof), the other the sliding visor and the wind deflector. > E91 On the E91 with Panorama glass roof there is a separate SHD control unit for the 2 drives.
5. Rain-light sensor / rain-light solar sensor The FZD control unit sends important messages for the operation of the wipers to the rain-light sensor or rain-light solar sensor (via the LIN bus, see below in the " «SYSTEM FUNCTIONS»(/bmw/x5/e70-2006-2010/remont/exterior-lights/#lights-service-techniques__system-functions) " section)
6. Condensation sensor The condensation sensor draws its power supply from the roof control panel.
7. Electrochromic interior mirror and electrochromic exterior mirrors The roof control panel controls the dimming of the electrochromic mirrors as follows: the roof function center control unit converts the analogue signal from the electrochromic interior rear-view mirror into a CAN message for the electrochromic door mirrors.
8. Ultrasonic interior motion sensor > E70, E81, E87, E90, E91, E92 The ultrasonic interior motion sensor draws its power supply from the roof control panel. The ultrasonic interior motion sensor is in the DWA control unit. > E70 The DWA control unit and ultrasonic interior motion sensor are integrated in the roof control panel.
9. 4 microwave sensors > E93 The 4 microwave sensors use microwaves to record movement inside the vehicle interior. A movement is detected if the reflection (echo) of the microwaves changes. The range or sensitivity of the microwave sensors is preset (depending on the vehicle model and the equipment fitted). The microwave sensors are connected to the alarm system control unit by a single-wire bus (K-bus). The DWA control unit is connected to the K-CAN.
10. FBD receiver: Remote control receiver > E81, E87, E93 The FBD receiver for the central locking system is installed in the interior mirror (FBD receiver is the receiver for remote control). In the standard equipment version, the FBD receiver draws its power supply from the power distributor in the junction box. If an FZD control unit is fitted (depending on the equipment variant), power is supplied from the power distributor in the junction box to the FBD receiver by the FZD control unit (wire is merely looped through). > E90, E91, E92 The FBD receiver is located in the aerial amplifier in the headlining above the rear window. Power is supplied from the power distributor in the junction box. > E70 The FBD receiver is installed in the aerial amplifier with aerial diversity in the tailgate. Power is supplied from the rear power distributor.
11. DWA LED The DWA LED is located on the underside of the interior mirror. The DWA LED flashes when the anti-theft alarm system is activated. When an alarm is triggered, the DWA LED lights up. The DWA LED draws its power supply from the roof control panel. The signal from the ultrasonic interior motion sensor for the DWA LED is simply looped through the roof control panel (i.e. the cable for the sensor is routed through the roof control panel). > E70 The FZD directly actuates the DWA LED. > E93 The DWA LED draws its power from power distributor in the junction box. The DWA LED is actuated by the DWA control unit (DWA control unit: siren with tilt alarm sensor and integrated DWA software).
12. Garage-door remote controls The 3 buttons for the garage door opener (also known as "integrated universal remote control") are in the interior mirror. The garage door opener draws its power supply from the roof control panel.

SYSTEM FUNCTIONS

In the basic variant , the following lights draw their power supply from the roof control panel

1. Interior light, front
2. Rear interior light
3. > E70 Reading light

These lights are activated via the footwell module (FRM).

In the high variant , the FZD control unit controls the following functions

1. Reading lamp
2. Interior lighting and top-light: Data transmission only from the buttons to the footwell module and from the footwell module to the lights (see below)
3. Sliding/tilting sunroof (except for Panorama glass sunroof E91)
4. Master for rain-light sensor or rain-light solar sensor
5. Self-diagnosis
6. The FZD control unit is the gateway (i.e. the data interface) for the following components and functions: Gateway between K-CAN and LIN bus Gateway for condensation sensor Gateway for Check Control Gateway for the electrochromic interior mirror and for the electrochromic exterior mirrors

The roof control panel can therefore be considered to have 3 functions

1. The roof control panel is an installation location for other components.
2. The FZD control unit controls some functions.
3. For a number of other functions, the FZD control unit acts as a gateway .

All of the above system functions are described in detail below.

1. The roof control panel is simply the installation location for the following components: Indicator lamp for passenger airbag deactivation The installation of an indicator lamp for passenger airbag deactivation depends on the equipment fitted and on the national version. The roof control panel is the installation location of the indicator lamp for passenger airbag deactivation. > E81, E87, E90, E91, E92 The indicator lamp for passenger airbag deactivation is actuated by the MRS control unit (MRS = "multiple restraint system"). > E70, E93 The ACSM safety system is employed on E70, E93 vehicles (ACSM = "Advanced Crash Safety Module", also known as "crash safety module"). The indicator lamp for passenger airbag deactivation is actuated by the crash safety module. Emergency call button Although the emergency call button is installed in the roof control panel, there is no electrical connection between it and the panel. The emergency call button is directly connected to the telephone control unit. Depending on the equipment fitted, the telephone control unit is the TCU or the ULF (TCU: Telematic Control Unit; ULF: universal charger and hands-free system). Microphone If a telephone has been installed, the two microphones for the telephone will also have been installed in the roof control panel. The two microphones are directly connected to the respective telephone control unit. > E93 The microphone is located on the steering column. NOTE: From 09/2006, only 1 microphone is to be fitted. This change will be introduced gradually through the various model series. The installation location of the microphone in the FZD depends on the national version (LHD or RHD). That means: On LHD vehicles, the microphone is installed on the left. On RHD vehicles, the microphone is installed on the right.
2. The FZD control unit in the roof control panel controls the following functions: Controlling the reading lamp The FZD control unit evaluates the buttons for the reading lamp and activates the reading lamp. Control of interior lighting and top-light For the control of the interior lighting and the top-light, the FZD control unit simply transmits data to the footwell module. The interior lighting and top-light are controlled as follows: Interior light When the interior-light button on the roof control panel is pressed, the FZD control unit sends a corresponding message to the footwell module. The footwell module sends a "Switch ON" or "Switch OFF" request to the roof function center control unit. The FZD control unit sends the "Switch ON" or "Switch OFF" request to the interior lights. The interior lighting is subject to the following regulations: Overrun of interior lighting: Depending on the encoding, the interior lights are switched on for a while after terminal R is switched off. The message is sent from the footwell module. Dimming: The interior lighting can be switched on dimmed or immediately at full illumination intensity. The message is sent from the footwell module when the interior-light button is pressed. The dimming settings are controlled by the FZD control unit. Controlling the power supply: The power supply for the interior lights is controlled by the FZD control unit with pulse-width modulation in order to compensate for voltage fluctuations in the vehicle's system. Consumer shutdown: The footwell module switches the entire interior lighting off when the "Consumer shutdown" message is sent on the K-CAN. This message is transmitted when the charge state of the battery is poor to maintain the battery's ability to start the vehicle for as long as possible, or for a defined time after terminal R is switched OFF. Top-light The top-light comes on automatically when Terminal R is switched on, along with the parking lights. Signal path: CAS (Car Access System) -> FRM (footwell module) -> FZD (roof control panel) -> LEDs for top light The FZD control unit simply transfers data from the FRM control unit to the top-light LED display. Sliding/tilting sunroof control > E70, E81, E87, E90, E92 The FZD control unit is responsible for controlling the sliding/tilting sunroof. The FZD control unit controls the sliding/tilting sunroof as follows: The FZD control unit evaluates the signals from the sliding/tilting sunroof switch. The FZD control unit actuates the sliding/tilting sunroof drive. > E70 The FZD control unit controls 2 drives. The FZD control unit receives the signals from the two Hall sensors regarding the position of the sliding/tilting sunroof. > E70 The FZD control unit also receives the signals from the two Hall sensors via the position of the sliding visor and the wind deflector. The FZD control unit executes the convenience closing request for the sliding/tilting sunroof (e.g. from the comfort access CA). The requests of the comfort access reach the FZD control unit via the K-CAN. > E91 The E91 with Panorama glass sunroof (option 402) has a separate SHD control unit. On these vehicles, the FZD control unit evaluates the sliding/tilting sunroof switch. The FZD control unit sends the "Open", "Close", etc. requests to the FZD control unit. The roof control panel control unit sends appropriate CAN messages to the sliding/tilting sunroof control unit (via the K-CAN). Master for rain-light sensor or rain-light solar sensor The FZD control unit provides the rain-light sensor or rain-light solar sensor a bus connection to the K-CAN. This enables the following messages and requests to be sent: Switch position of the wiper switch or button for intermittent operation, depending on the rain-light sensor or rain-light solar sensor Position of the thumbwheel for setting the sensitivity of the rain-light sensor or rail-light solar sensor (selection of interval stage for rain sensor with wipers in intermittent operation) Status of wipers: The signal from the reset contact in the wiper motor is transmitted via the FZD control unit to the rain-light sensor or rain-light solar sensor. "Switch dipped-beam headlights on" prompt from rain-light sensor or rain-light solar sensor to footwell module: If the rain-light sensor or rain-light solar sensor detects that it is dark, the dipped-beam headlights will come on automatically (if the light switch is in switch position "A" = "Automatic driving lights control").
3. The FZD control unit in the roof control panel (High variant) is the data interface for the following components and functions: Gateway between K-CAN and LIN bus The FZD control unit is the data interface for the rain-light sensor or rain-light solar sensor between the K-CAN and the LIN bus. Gateway for condensation sensor The FZD control unit operates as a data interface for the condensation sensor as follows: The FZD control unit receives the signals from the condensation sensor via the interior mirror connector. The signals from the condensation sensor are pulse-width-modulated. The signals indicate the relative moisture on the inside of the windscreen. The FZD control unit converts the signals from the condensation sensor into digital messages for the K-CAN. The IHKA control unit receives these messages via the K-CAN. The demisting program is started accordingly. Gateway for Check Control The roof control panel issues Check-Control messages providing information about the sliding/tilting sunroof. Anti-trap circuit Loss of normalization following mechanical actuation: If the sliding/tilting sunroof has been moved mechanically using the emergency actuating unit, the tilted end stop must be taught in again (normalization). Gateway for the electrochromic interior mirror and for the electrochromic exterior mirrors The FZD control unit is the data interface between the electrochromic interior mirror, K-CAN and electrochromic exterior mirrors. The electrochromic exterior mirrors are controlled as follows when a request is sent via the electrochromic interior mirror: The electrochromic interior mirror sends a signal to the FZD control unit. The FZD control unit evaluates the signal and converts it into a percentage value (the percentage by which the exterior mirrors are to be dimmed). The FZD control unit sends this percentage value to the footwell module (FRM) via the K-CAN. The footwell module (FRM) sends the "Dim electrochromic exterior mirrors" request to the driver's door switch block. The driver's door switch block forwards the request to the electrochromic exterior mirror electronics. The electrochromic exterior mirrors are dimmed accordingly. For safety reasons, the electrochromic mirrors are not dimmed when reverse gear is engaged. If the vehicle has a manual transmission, the reverse-light switch will send a signal to the footwell module. The message is forwarded to the FZD control unit from the footwell module via the K-CAN. If the vehicle has an automatic transmission, the FZD control unit will receive the message "Reverse gear engaged" from the EGS control unit (via the K-CAN). (EGS: Electronic transmission control; SMG: Sequential manual transmission) The electrochromic mirrors are not dimmed until the reversing maneuver has been completed.

PRECONDITIONS FOR ACTIVATION

The FZD control unit is active under the following conditions

1. Terminal R ON, or
2. Terminal 15 ON and
3. K-CAN active

If none of these 3 conditions is met, the FZD control unit will switch to sleep mode and can be woken up by pressing the buttons for the interior lighting.

Operation

This section describes

1. How to switch the interior lighting on and off
2. How to set the sensitivity of the rain-light sensor or rain-light solar sensor How to switch the interior lighting on and off The interior lighting is switched on and off using 3 buttons: Interior-light button: The interior-light button switches both the front-compartment interior lights and the rear-compartment interior lights on and off. Button for reading light on driver's side and button for reading light on passenger side: The button only ever switches the reading lamp on that side on and off. Setting the sensitivity of the rain-light sensor or rain-light solar sensor The rain-light sensor consists of a driving light sensor and a rain sensor. The rain-light solar sensor comprises a driving light sensor, a rain sensor and a solar sensor The driving light sensor measures the surrounding brightness outside the vehicle. Depending on the sensitivity of the driving light sensor, the dipped headlight will come on at dusk or when it goes dark ("Automatic driving lights control" option). The sensitivity of the driving light sensor can be set as follows: On vehicles without CID (Central Information Display) On vehicles without CID (Central Information Display), the sensitivity of the driving light sensor is encoded via the BMW diagnosis system. On vehicles with CID (Central Information Display): The sensitivity of the driving light sensor can be set directly in the vehicle using the controller (in the Central Information Display).

JAPANESE NATIONAL VERSION

The roof control panel creates the earth connection for the interior mirror with electronic toll function.

Scheme 69

Note. Option 524 is only available in conjunction with option 522. Option 524 "Adaptive headlights" is only available in conjunction with option 522 "Xenon dipped and main beam headlights".

Note. EU approval for option 522 only in conjunction with option 502. Option 522 "Xenon dipped and main-beam headlights" is only available together with option 502 "Headlight cleaning system" (in countries subject to EU approval).

Note. ALC => AHL The development code for the adaptive headlights was "ALC". ALC stood for "Adaptive Light Control". The marketing and sales designation for option 524 in English-language markets is "adaptive headlights", abbreviated to "AHL". Diagnosis and technical vehicle documentation therefore use the abbreviation "AHL". However, "ALC" is still used on some control units and in the EPC (Electronic Parts Catalogue).

Adaptive headlights turns the bi-xenon headlights towards the inside of a bend when cornering. This improves illumination of the curve of the road. Visibility is therefore improved.

When cornering, the driver is not looking into a "black hole"- instead, the adaptive headlights allow the driver to see the curve of the road.

This SI Technology bulletin (SBT) describes the adaptive headlights for the following model series

1. > E60, E61, E63, E64 up to 03/2005: The system overview applies accordingly for the E65 and E66 up to 03/2005.
2. > E60, E61, E63, E64 from 03/2005 until 09/2005 The system overview applies accordingly for the E65 and E66 from 03/2005.

Note. AHL control unit discontinued from 03/2005. From 03/2005, the AHL control unit software is integrated into the light module on the E60, E61, E63, E64, E65 and E66. The AHL control unit is no longer fitted.

1. > E60, E61, E63, E64 from 09/2005 The vehicle electrical system was changed from 09/2005. As a result of the change, several control units were discontinued and some control unit functions were integrated into new control units.
2. > E70 The turning lights function is new on the E70 from the start of series production. The turning lights give the area next to the carriageway additional illumination when you are turning or cornering (driving in tight bends). They are also active when you park the vehicle. Depending on the country concerned, the turning lights are activated when cornering.
3. > E81, E87, E90, E91, E92, E93 For the E81, E92, E93 from start of series production and for the E87 from 03/2007, the turning light function is new.

Note. Turning lights on E70, E81, E87, E92, E93 only in conjunction with option 524 Turning lights are a subfunction of option 524 "Adaptive headlights". Bi-xenon headlights are standard equipment on the E92, E93. Option 524 is standard on the US version.

Note. AHL components on E46, E53 and E83 There is a separate system description for the adaptive headlights on the E46, E53, E83.

Note. AHL components on the E63, E64 The E63, E64 has a zero-position sensor. Otherwise, the E63 and E64 are the same as the other 5-Series models.

Note. Components for adaptive headlight on E70, E81, E87, E90, E91, E92, E93 On the E81, E87, E90, E91, E92, E93, the adaptive headlights largely correspond to those on the E60, E61, E63, E64, E65 and E66: E70, E81, E87, E90, E91, E92, E93 vehicles are equipped with a zero-position sensor. On the E70, E81, E87, E90, E91, E92, E93, the FRM (footwell module) acts as control unit for exterior lighting. The footwell module contains the functions of the light module, AHL control unit and the general module (or body general module).

The following components and control units provide signals for the adaptive headlight system

1. CAS: Car Access System The Car Access System supplies signals for the terminal management (e.g. terminal 15 ON). The adaptive headlights control unit is activated when terminal 15 is switched ON.
2. Light switch The rotary switch for the side lights and dipped headlights differs depending on the vehicle equipment level (adaptive headlights, automatic driving lights control, automatic or manual headlight-range adjustment). For the adaptive headlights function to operate, the light switch must be set to position "A" ("A" = "automatic driving lights control" and "adaptive headlights").
3. Turn-signal/main-beam switch The main-beam headlights are switched on and off with the turn-signal/main-beam switch (by pressing or pulling the switch). The adaptive headlights function operates with both dipped and main-beam headlights.
4. SZL: Steering Column Switch The SZL control unit forwards the signals from the turn-signal/main-beam switch to the adaptive headlights control unit. > E60, E61, E63, E64, E65 and E66 > E70, E81, E87, E90, E91, E92, E93 The steering column switch cluster forwards the signals from the turn-signal/main-beam switch to the footwell module (FRM).
5. Ride-height sensors If the special equipment "Adaptive headlights" is fitted, the adaptive headlights control unit evaluates the signals from the ride-height sensors. This is because: the adaptive headlights control unit also controls the automatic headlight-range adjustment. The automatic headlight-range adjustment feature adjusts the vertical aim of the headlights to compensate for variations in the vehicle tilt angle (e.g. when the vehicle is laden, and under braking and acceleration in dynamic driving situations).
6. Brake light switch If the special equipment "Adaptive headlights" is fitted, the signals from the brake light switch are read by the adaptive headlights control unit. In addition, the brake light switch signal is also a signal for automatic headlight-range adjustment, see above: Ride-height sensors.
7. Position sensor > E60, E61 > E65, E66 Hella headlights have a position sensor. The position sensor in the positioner module for the bi-xenon headlights supplies a signal for the horizontal movement of the headlights.
8. Zero-position sensor > E63, E64 > E70, E81, E87, E90, E91, E92, E93 Automotive Lighting headlights, previously Bosch, have a zero-position sensor. The zero-position sensor registers the horizontal movement of the headlight.
9. EGS control unit or reversing light switch When reverse gear is engaged, the headlights are moved to the straight-ahead position. On vehicles with automatic transmission, the EGS control unit provides the "Reverse gear engaged" signal. (EGS: electronic transmission control). On vehicles with manual transmission, the signal is supplied by the reversing light switch.
10. Rain-light sensor for automatic driving lights control The rain-light sensor measures the ambient brightness outside the vehicle. In twilight conditions, the rain-light sensor transmits the message "Twilight" so that the automatic headlight range adjustment can activate dipped headlights. The headlights are tilted up and down as required, but they are not yet moved towards the bend in the road. In darkness, the rain-light sensor sends the message "Darkness". The adaptive headlights are then activated when the vehicle is cornering. The headlights are moved to the left or right
11. Steering-angle sensor and DSC sensor The steering angle sensor and DSC sensor (DSC = Dynamic Stability Control) supply signals for the adaptive headlights to the adaptive headlights control unit. These signals are evaluated as follows, depending on the vehicle's speed: Vehicle speeds up to 30 km/h: The adaptive headlights function is controlled using the information from the steering angle sensor (in the steering column switch cluster). Vehicle speeds between 30 km/h and 50 km/h : In the 30 to 50 km/h speed range, there is a continuous transition in signal evaluation: from the evaluation of signals sent by the steering angle sensor to evaluation of the signals sent by the yaw-rate sensor (in the DSC sensor). In extreme dynamic driving situations , e.g. if the vehicle starts to skid or fishtail, even at speeds less than 50 km/h , the signals from the yaw-rate-sensor are considered. If the vehicle starts to skid or fishtail, the headlights will move to the straight-ahead position. The headlights are not moved until the vehicle has stabilized. Vehicle speeds over 50 km/h: At speeds upwards of 50 km/h, the signals from the yaw-rate sensor (in the DSC sensor) form the primary basis for control of the adaptive headlights function. Reason: For a constant cornering radius, the steering angle required increases disproportionately with speed. In addition, the steering angle required also depends on the coefficient of friction of the road surface. Yaw rate is directly proportional to speed. For this reason, the yaw rate is always the most suitable measure for controlling the adaptive headlights at high speeds. Even at high speeds, however, the steering angle sensor signal is used to detect (predict) the driver's commands in advance . This prediction is important: The yaw rate signal is not supplied until the vehicle has responded to the steering wheel movement. The steering-angle sensor signal is disabled so that rapid, momentary steering adjustments do not affect the adaptive headlights function.

A number of control units are involved in the adaptive headlights system (see above: CAS, EGS, SZL).

Depending on the model series and model version concerned, the adaptive headlights are actuated by the following control units

1. AHL: Adaptive headlights > E60, E61, E63, E64, E65, E66 up to 03/2005 The AHL control unit actuates the adaptive headlights. For safety reasons, the AHL control unit is also responsible for the automatic headlight-range adjustment. This is because: Oncoming traffic must not be dazzled by the adaptive headlights. If a headlight sticks in an unfavorable position, the AHL control unit will attempt to move this headlight down (using the stepper motors in the automatic headlight-range adjustment). The AHL control unit is connected to the PT-CAN.
2. LM: Light module > E60, E61, E63, E64, E65, E66 from 03/2005 From 03/2005, the AHL control unit is integrated in the light module. The light module (LM) controls and monitors all vehicle lights. Information is transmitted and received via the K-CAN data bus. The light module actuates the indicator light for the adaptive headlights (on the light switch).
3. FRM: Footwell module > E70, E81, E87, E90, E91, E92, E93 The footwell module controls the exterior lighting and the adaptive headlights. The footwell module thus takes the place of the light module and the AHL control unit. The footwell module actuates the indicator light for the adaptive headlights (on the light switch).

The footwell module has its own system description.

The following additional control units are involved in the adaptive headlights

1. SMC: Stepper motor controllers The stepper motor controllers control the stepper motors in the headlights (for the automatic headlight-range adjustment and for the adaptive headlights). The stepper motor controllers are not capable of self-diagnosis. The stepper motor controllers are diagnosed and encoded via the control unit for adaptive headlights.
2. SGM: Safety and gateway module > E60, E61, E63, E64 until 09/2005 and E65, E66 The safety and gateway module (SGM) is the interface between the two data buses K-CAN and PT-CAN. Thus, all information exchanged between the light module and the AHL control unit passes through the SGM. Information from the yaw-rate sensor (in the DSC sensor) is also fed through the SGM to the AHL control unit.
3. KGM: Body gateway module > E60, E61, E63, E64 from 09/2005 The vehicle electrical system was changed from 09/2005. As a result of the change, several control units were discontinued and some control unit functions were integrated into new control units. The new body gateway module (KGM) supersedes the safety and gateway module (SGM) previously fitted, the door modules and the micro-power module.
4. Xenon-headlight control unit The xenon-headlight control unit actuates the bulb in the bi-xenon headlights. The xenon-headlight control unit is not capable of self-diagnosis. The xenon control unit is monitored by the light module (E70, E81, E87, E90, E91, E92, E93: footwell module).

The following components are controlled

1. Headlights Option 524 "Adaptive headlights" is only available in conjunction with option 522 "Xenon dipped and main-beam headlights". This means that bi-xenon headlights are employed.
2. Stepper motors for the adaptive headlights The stepper motors turn the positioner modules in the bi-xenon headlights. The stepper motors move the headlights vertically and horizontally (vertically = up and down for automatic headlight range adjustment; horizontally = left and right for the adaptive headlights function). The positioner modules execute the movement.
3. Indicator light on the light switch The indicator light (green LED) next to the "A" (= "automatic driving lights control" and "adaptive headlights") has 2 display functions: The indicator light lights up permanently when the automatic driving lights control or adaptive headlights function is switched on (= light switch in position "A"). The indicator light flashes if a fault develops in the adaptive headlight system. > E60, E61, E63, E64, E65 and E66: The indicator light is actuated by the light module. > E70, E81, E87, E90, E91, E92, E93: The indicator light is actuated by the footwell module.

Note. From 09/2007, the fault indicator in the form of the indicator lamp on the light switch flashing is discontinued. From 09/2007, the fault indicator in the form of the indicator lamp on the light switch flashing is discontinued due to legal stipulations. From 09/2007 system fault will be indicated by a Check-Control message in the instrument cluster.

The adaptive headlights system moves headlights horizontal (i.e. from left to right) in order to illuminate the inside of a bend when cornering.

The following functions of the adaptive headlights system are described below

1. System activation and automatic calibration
2. Activation of stepper motor controllers
3. Speed-dependent analysis of signals
4. Adjustment of headlight horizontal aim
5. Deactivation of adaptive headlights function under extreme handling conditions
6. Deactivation of adaptive headlights function in response to system faults
7. Setting headlights to parked position
8. Automatic headlight-range adjustment
9. Adaptive headlights for automatic driving lights control
10. Turning light

Note. Different control units for adaptive headlights. > E60, E61, E63, E64, E65, E66 up to 03/2005: The adaptive headlights are actuated by the AHL control unit. > E60, E61, E63, E64, E65, E66 from 03/2005: The adaptive headlights are actuated by the light module (LM). > E70, E81, E87, E90, E91, E92, E93: The adaptive headlights are actuated by the footwell module (FRM). The footwell module has its own system description. For this reason, the following text refers to the general "control unit for adaptive headlights".

System activation and automatic calibration

When terminal 15 is switched ON, the headlights always perform a calibration sequence, even if the dipped headlights are not switched on. The control unit for adaptive headlights sends the "perform calibration sequence" request to the stepper motor controllers (SMCs, control units for the headlight stepper motors). The stepper motor controllers actuate the stepper motors in the headlights. The calibration sequence is performed. In the calibration sequence, the headlights move as follows

1. The headlights move to the right and left (= calibration sequence for adaptive headlights).
2. The headlights move up and down (= calibration sequence for automatic headlight-range adjustment).
3. At the end of the calibration sequence, the headlights are in the straight-ahead position.

Following the calibration sequence, the system is ready for operation.

When reverse gear is engaged, the headlights are moved to the straight-ahead position.

Note. The calibration sequence is performed only after terminal 15 has been switched OFF for at least 15 seconds. > E66, E61, E63, E64, E65, E66 until 09/2006 > E87, E90, E91, E92, E93 until 03/2007 If terminal 15 is repeatedly switched on and off (e.g. for demonstration purposes), the calibration sequence will not be executed every time terminal 15 is switched on. Terminal 15 must have been switched off for at least 15 seconds before it is switched on again. Only then is a calibration sequence performed when terminal 15 is switched on.

Note. Calibration sequence always after terminal 15 ON and dipped-beam headlights ON. > E66, E61, E63, E64, E65, E66 from 09/2006 > E70 from start of series production > E81, E87, E90, E91, E92, E93 from 03/2007 If terminal 15 is repeatedly switched on and off (e.g. for demonstration purposes), the calibration sequence will not be executed every time terminal 15 and the dipped-bead headlights are switched ON.

Note. Calibration sequence with enlarged range of movement. > not E65, E66 From 09/2007, starting with the E60, E61, E63, E64, a calibration sequence with larger range of movement will be introduced. The calibration sequence with larger range of movement will then gradually be introduced on other model series.

Activation of stepper motor controllers

The control unit for adaptive headlights sends the stepper motor controllers (SMC) the nominal values for the positioner modules (position of positioner modules and speed of movement).

The control unit for adaptive headlights calculates the nominal values using the following signals

1. Vehicle road speed
2. Steering angle (at speeds up to 50 km/h, dependent on encoding)
3. Yaw rate (50 km/h upwards, see "Steering-angle sensor and DSC sensor")

Speed-dependent analysis of signals

Depending on the road speed, the adaptive headlights are controlled using the following signals: Signals from the steering angle sensor and signals from yaw-rate sensor (in the DSC sensor).

The encoding (at the end of the production line) determines the priority assigned to sensor signals above which speed threshold.

Adjustment of headlight horizontal aim

The stepper motor controllers move the headlights to the right or left when the vehicle corners.

Horizontal range of movement of headlights

1. Inwards, i.e. towards center of vehicle: up to max. 8 °
2. Outwards: up to max. 15°

Example: Right-hand bend

The right-hand headlight turns by up to 15 ° (the right-hand headlight is the "inside" headlight on a right-hand bend).

Viewed from the vehicle, the right-hand headlight moves "outwards".

The left-hand headlight moves up to 8 ° (the left-hand headlight moves towards the middle of the vehicle, i.e. "inwards" as viewed from the vehicle).

The headlight on the outside of the bend has to reach its end position at the same time as the headlight on the inside of the bend so that the carriageway remains smoothly and evenly illuminated.

On a right-hand bend, the left-hand headlight is on the outside of the bend. The right-hand headlight is on the inside of the bend.

Deactivation of adaptive headlights function under extreme handling conditions

If the vehicle drifts, skids and loses sideways grip, the adaptive headlights function is deactivated as follows

1. The headlights are returned to the straight-ahead position. The headlights are no longer turned.
2. The dipped headlights remain on.

Deactivation of adaptive headlights function in response to system faults

Until 09/2007, a system fault will be indicated by the indicator lamp on the light switch flashing.

From 09/2007 system fault will be indicated by a Check-Control message in the instrument cluster.

Dazzling of oncoming traffic must be prevented in the event of a system fault.

For this reason, the adaptive headlights function is deactivated as follows

1. If the stepper motors are still functional, the headlights are returned to the straight-ahead position. The headlights are no longer moved towards bends in the road.
2. If it is no longer possible for a headlight to be moved back to the straight-ahead position, the headlight is tilted downwards (by the stepped motors for automatic headlight-range adjustment). This prevents dazzling of oncoming traffic.
3. Vehicles up to 09/2007 If the headlight cannot be tilted downwards, the bi-xenon bulb in this headlight is disabled as follows: When the vehicle is parked up, the control unit registers sleep mode for the adaptive headlights, as follows: Vehicle standstill and terminal R OFF for several minutes. The next time the vehicle is restarted, the bi-xenon light of the defective headlight is not switched on. The front foglights are switched on in order to ensure a minimum level of illumination. The dipped beam headlights are not switched off while the vehicle is in motion. NOTE: From 09/2007, the dipped-beam headlights will not be switched off in the event of a system fault. If a system fault develops in the adaptive headlights, the dipped-beam headlights for the affected headlight will not be switched off.

Setting headlights to parked position

When terminal R is switched off, the headlights move to the parked position. The parked position is important for the headlights' next calibration sequence: From the parked position, the headlights are run through a calibration sequence in the pre-drive-check. During each calibration sequence, the control unit for adaptive headlights relearns the straight-ahead position for the headlights.

When the headlights have reached the parked position, the stepper motor controllers SMCs inform the control unit for adaptive headlights ("verification").

The control unit for adaptive headlights deactivates the stepper motor controllers.

The run-down period lasts approx. 10 seconds.

Automatic headlight-range adjustment

If the special equipment "Adaptive headlights" is fitted, the control unit for adaptive headlights also controls the automatic headlight-range adjustment.

The automatic headlight-range adjustment adapts the headlight range for different operating conditions. Variations in the vehicle tilt angle are produced by vehicle loads and braking or acceleration in extreme driving situations. The automatic headlight-range adjustment moves the headlights up and down as required.

The control unit for adaptive headlights also controls the automatic headlight-range adjustment as follows

1. The ride-height sensors and the brake light switch supply the signals for the automatic headlight-range adjustment.
2. The control unit for adaptive headlights computes the vehicle inclination (longitudinally to the roadway) from the signals.
3. The stepper motors for the automatic headlight-range adjustment automatically and dynamically control the headlight range. The headlight range is adjusted so that the actual headlight range conforms to the legally required headlight range as follows: If vehicle rear is lower than front: The actual headlight range will be longer than the legally stipulated range. The headlight beam height is lowered to reduce the headlight range to match the legal requirement. If the vehicle is horizontal: The actual headlight range will be the same as the legally stipulated range. If vehicle front is lower than rear: The actual headlight range will be shorter than the legally stipulated range. The headlight beam height is raised to increase the headlight range to match the legal requirement.

Adaptive headlights for automatic driving lights control

The automatic driving lights control feature (option in conjunction with the rain-light sensor) automatically switches the side lights and dipped headlights on or off.

Switch-on conditions

1. The automatic driving lights control must be encoded (in the light module on the E60, E61, E63, E64, E65, E66, in the footwell module on the E70, E81, E87, E90, E91, E92, E93).
2. The light switch must be in position "A" ("A" for automatic driving lights control and adaptive headlights).
3. The rain-light sensor must be installed and operational. The rain-light sensor detects the brightness of the ambient light. The rain-light sensor sends the following prompts to the light module (on the E70, E81, E87, E90, E91, E92, E93: footwell module): Ambient brightness low: In twilight, darkness, in an underground garage or tunnel. "Switch on dipped headlights" request Ambient brightness sufficient. "Switch off dipped headlights" request

If only the side lights are to be switched on, the light switch must be set to side lights (switch position 1).

When the light switch is set to position "A", the control unit for adaptive headlights is also activated

1. When the automatic driving lights control function switches on the dipped headlights (e.g. at dawn/dusk), the adaptive headlights function is notified at the same time. The control unit for adaptive headlights thus assumes control of the automatic headlight-range adjustment.
2. In addition, signals from the rain-light sensor are evaluated (E60, E61, E63, E64, E65, E66: by the light module; E90, E91, E92, E93: by the footwell module). The headlights are not turned when the vehicle is cornering until total darkness sets in.

The message "dipped headlights on" is given individually for each headlight.

If a headlight fails, the adaptive headlights are switched off.

The front foglights are switched on in order to ensure a minimum level of illumination.

Turning lights

The turning lights are coupled to the adaptive headlights (option 524).

The footwell module (FRM) uses the following signals to adjust the turning lights

1. Steering angle
2. Yaw rate
3. Status of reverse gear

1. > E81, E92, E93 with start of series production and E87 from 03/2007 Instead of the main-beam headlight (H7), the main headlight with turning light has a fixed additional reflector with an H3 bulb. The special shape of the lens prevents dazzle to the front.

The illustration shows the main headlight with turning light on the E81, E87, E92, E93

Scheme 70

1. Bi-xenon light
2. H8 bulb for side lights and daytime driving lights
3. H3 bulb for turning lights
4. Reflector for turning lights

The illustration shows the turning light on the E81, E87, E92, E93

Scheme 71

1. Left turn
2. Right turn

The following conditions must be satisfied for the turning lights to be switched on

1. Terminal 15 ON
2. Light switch in position "A" ("A" stands for automatic driving lights control)
3. Rain-light sensor detects twilight or darkness (threshold exceeded)

The turning lights are not activated at speeds greater than 70 km/h.

1. > Europe version

For legal reasons, the turning lights on the Europe version can only be activated via the turn signal indicator at speeds up to 40 km/h.

When reversing, the footwell module (FRM) activates the turning lights as follows in the speed range 0 km/h to 35 km/h

1. US version: both sides
2. Other countries: outside of turn only

When the turn signal indicator is switched on

If the vehicle is stationary, the turning lights will automatically be deactivated after approx. 4 seconds, e.g. when waiting at traffic lights. However, the turning lights can be activated again with the turn-signal/main-beam switch (up to 3 times) until the reflector has reached a certain temperature.

A temperature model protects the headlights from excessive thermal stress.

The switching-off conditions for the turning light depend on the country concerned.

Note. Temperature monitoring by temperature model A temperature model in the footwell module calculates the temperature of the reflector. The temperature of the reflector must not exceed a certain value. If a critical temperature is reached, the footwell module (FRM) will deactivate the turning lights. The turning lights can be activated again after a cooling-off phase.

1. > E70 with start of series production The turning lights are realized using the front foglights. (Reason: The installation location of the headlights is too high for the turning lights. This prevents legal stipulations from being adhered to.) Depending on actuation, the right-hand and/or left-hand front foglight is switched on. The turning lights are actuated by the light module (LM). The front foglights have an additional reflector to illuminate the areas to the sides better. When turning, the front foglight on the inside of the turn is automatically activated. The additional reflector for the turning light reflects the light beam towards the turning area.

The turning light are not switched on suddenly but rather faded according to special time parameters. Depending on the country concerned, the turning lights are switched on when cornering.

The illustration shows the front foglight on the E70

Scheme 72

1. Additional reflector for the turning light
2. Reflector for the front foglights
3. Bulb

The following conditions must be satisfied for the turning lights to be switched on

1. Terminal 15 ON
2. Light switch in position "A" ("A" stands for automatic driving lights control)
3. Rain-light sensor detects twilight or darkness (threshold exceeded)

and

1. Turn signal indicator ON (not one-touch turn signal)
2. Speed range (forwards): Europe and Japan version from 0 km/h to 35 km/h US version from 0 km/h to 65 km/h
3. Swivel angle (theoretical): when stationary > or = 77° when driving > or = 10°

Alternatively

1. Speed range (reverse): 0 km/h to 35 km/h
2. Swivel angle (theoretical): when stationary or driving > or = 70°

If the vehicle is stationary, the turning lights will automatically be deactivated after a certain time, e.g. when waiting at traffic lights. However, the turning lights can be activated again with the turn-signal/main-beam switch.

The following conditions must be satisfied for the turning lights to be switched off

1. Light switch not in position "A" ("A" stands for automatic driving lights control)
2. Rain-light sensor does not detect twilight or darkness (lower threshold exceeded)

Alternatively

1. Turn signal indicator OFF
2. Speed range (forwards): Europe and Japan versions > or = 40 km/h US version > or = 70 km/h
3. Swivel angle (theoretical): when stationary 77° when driving 10°

Alternatively

1. Speed range (reverse): > or = 40 km/h
2. Swivel angle (theoretical): when stationary and when driving below a certain value

Alternatively

1. Vehicle skids and swings out.

Alternatively

1. Front foglights are switched on with the front foglights switch.

The control unit for adaptive headlights is "awake" from terminal 15 ON.

The movement of the lights is subject to the following conditions

1. Reverse gear must not be engaged.
2. The system is free of faults (indicator lamp not flashing and no Check-Control message)
3. The bulbs for the bi-xenon lights are OK in both headlights.
4. The vehicle must not be skidding or fishtailing.
5. The rain-light sensor must detect darkness.
6. Additional precondition for activation: automatic driving lights control is active (light switch in position "A", see above).

Notes for service staff

1. Car and Key Memory: > E60, E61, E63, E64, E65, E66 The sensitivity of the driving light sensor can be set to one of 2 settings with the Car and Key Memory. > E70, E81, E87, E90, E91, E92, E93 All Car and Key Memory functions are programmed inside the vehicle itself. (Please refer to the "Personal profile" section of the Owner's Handbook: Personal settings for a maximum of 3 remote control units via the display in the instrument cluster or via the Central Information Display.)

NATIONAL VERSIONS

The options "Daytime driving lights" and "Manual headlight-range adjustment" are available in certain countries. Vehicles with manual headlight-range adjustment do not have adaptive headlights. This is because vehicles with manual headlight-range adjustment have halogen dipped headlights. Adaptive headlights (option 524) are only available in conjunction with option 522 "Xenon dipped and main-beam headlights".

Switching on adaptive headlights in conjunction with daytime driving lights function

The "Daytime lights" option (Northern Europe and Canada) means that dipped-beam headlights and side lights (E70, E92, E93: daytime driving lights) are always switched on

1. Light switch in position "2"
2. Terminal 15 ON

The automatic headlight-range adjustment is active (actuated by the control unit for adaptive headlights).

If terminal 15 is switched off, the dipped headlights and the side lights are automatically switched off as well.

The light switch must also be set to position "A" with the "Daytime driving lights" option. The control unit for adaptive headlights is then in standby.

System functions for "Daytime lights" option when the light switch is set to position "A"

1. If the vehicle is encoded with the "Daytime driving lights" option (end of production line), the light switch can remain in position "A" at all times. When terminal R is switched on, the side lights, parking lights and licence plate lighting are switched on. As soon as terminal 15 is switched on, the dipped headlights are also switched on.
2. When the dipped headlights are switched on, the control unit for adaptive headlights is activated (for automatic headlight-range adjustment).
3. The indicator lamp on the light switch lights up and indicates that the system is functional.
4. The adaptive headlights turn when the vehicle is stationary if the steering wheel is turned (to the right only).
5. The headlights are moved when the vehicle corners if the rain-light sensor registers darkness.

The switch-on conditions for the adaptive headlights in conjunction with special equipment "Daytime driving lights" are as follows

1. The vehicle must be encoded with the "Daytime driving lights" option (end of production line)
2. The light switch must be in position "A"
3. Terminal 15 must be switched on and reverse gear must not be engaged
4. Rain-light sensor must detect darkness

Subject to change.

See also:
• SYSTEM FUNCTIONS