Exterior Lights Function - GF82.10-P-0003FR
Model 257, 290
up to model year 2021
Except code P35 (Light Package)
With code P35 (Light package)
Function requirements, general
- Circuit 30 ON
Exterior lights, general
The exterior lights control all the safety and comfort-relevant functions of the front, side and rear lamps on the vehicle.
Several functions of the exterior lights are only restrictedly available if transport, production, roller or trade fair mode has been activated or if a testing function has been activated (e.g. Technical Inspection Association check).
- Transport mode:
Transport mode describes a special status during transport of the vehicle from the manufacturer's to the end customer's. In transport mode, only the base functions of the exterior lights (e.g. low beams, turn signal) are available.
If circuit 15 is ON and the vehicle is not at a standstill, the low beams are switched on automatically after 2 s. These conditions can also be fulfilled if the vehicle is moved in any direction by a vehicle lift or during loading.
- Production mode:
- Production mode describes a special status during production of the vehicle. In production mode, only the base functions of the exterior lights (e.g. low beams, turn signal) are available. The switch position of the exterior lights switch is ignored.
- Roller mode:
Roller mode describes a special status for the time in which the vehicle is on a roller dynamometer (e.g. brake test, certification). In roller mode, only the daytime running lights are actuated, even when it is dark (request for auto on/off driving lights via the light sensor).
- Trade fair mode:
Trade fair mode describes a special status for the time in which the vehicle is exhibited (e.g. consumer fair, exhibition, presentation). In trade fair mode, all light functions can be switched on via the diagnostic tester (regardless of the switch position of the exterior lights switch).
- Check function:
All lighting functions can be switched on via the diagnostic tester for the technical vehicle inspection.
A differentiation is made between the following versions of the front lamp units in accordance with the vehicle equipment:
- Static LED version lamp unit
(Except code P35 (Light Package))
- Dynamic LED version lamp unit
(With code P35 (Light package))
The exterior lights contain the following functions:
- Function sequence for thermal management of front lamp unit
- Function sequence for switching off the exterior lights
Further functions are described in separate documents:
- Standing/parking lights actuation function
- Standing lights actuation
- Lights on warning
- Parking lamp actuation
- Headlamp control function
- Low beam actuation
- High beam actuation (high beams, headlamp flasher)
- Daytime running lamps actuation
- Auto on/off driving lights (via rain/light sensor or wiper activities)
- Intelligent Light System, function (with code P35 (Light package))
- Cornering illumination
- Active curve illumination
- Active light distribution (motorway lights, extended fog light function)
- Adaptive Highbeam Assist, function (with code P35 (Light package))
- Optical headlamp range adjustment
- Automatic high beams
- Partial high beams
- Front fog light actuation, function
- Turn signal light actuation function
- Turn signaling (left turn signal, right turn signal, one-touch turn signaling)
- Hazard warning flashing
- Brake lights actuation function
- Backup light actuation function
- Ambient illumination, function
- Headlamp delayed switch-off
- Locator lighting (AFB)
- Substitute lamp control/emergency light actuation function
Function sequence for thermal management of front lamp unit
The front lamp units have temperature sensors that are used to sense the heat development in the area of the actuated LEDs. If the LEDs or plastic housings of the front lamp units threaten to overheat as a consequence of high outside temperatures or high actuation currents, the actuation currents of the LEDs are reduced, thereby minimizing heat development.
For active ventilation, the following additional components are integrated into the front lamp units:
- Fan motor 1, front left lamp unit, actuated by left headlamp control unit
- Left front lamp unit fan motor 2, actuated by left front lamp unit LED matrix control unit (with code P35 (Light package))
- Fan motor 1, right front lamp unit, actuated by right headlamp control unit
- Right front lamp unit fan motor 2, actuated by right front lamp unit LED matrix control unit (with code P35 (Light package))
The fan motors are actuated as soon as the low beams or the high beams are switched on. The active ventilation through actuation of the fan motors is used simultaneously for defrosting and de-icing the front lamp units at low outside temperatures.
Function sequence for switching off the exterior lights
By switching off the exterior lights, the on-board electrical system load by the active standing or parking lights actuation is reduced.
Discharge of the on-board electrical system battery (G1) is prevented.
The low beams may be switched on because of the automatic driving lights or manually using the exterior lights switch. It is automatically deactivated with circuit 15 OFF if the engine was switched off beforehand and the vehicle is at a standstill. The standing lights may be switched on because of the manually switched on low beams, the auto on/off driving lights, the daytime running lights (only in vehicles with CODE 498 (Japan version)) or manually via the exterior lights switch.
If the driver door is opened with terminal 15C ON or if the driver door is closed when terminal 15C is switched off, the standing light is switched off.
As soon as the energy management system determines that the starting capability of the engine is impaired, the standing lights are switched off provided that they were manually activated (exterior lights switch in standing lights or parking lights position).
If the "Ambient illumination" function has been activated via the head unit, it automatically switches itself on when the engine is turned off. The standing light remains on for the configured period from the point at which the last door or the trunk was closed.
| Standing/parking lights actuation, function | GF82.10-P-3060FR | ||
| Headlamp control, function | GF82.10-P-2009FR | ||
| Function of Intelligent Light System | Model 257, 290 up to model year 2021 with code P35 (Light Package) |
GF82.10-P-3090FR | |
| Function of Adaptive Highbeam Assist | Model 257, 290 up to model year 2021 with code P35 (Light Package) |
GF82.10-P-3091FR | |
| Front fog light actuation, function | GF82.10-P-3070FR | ||
| Turn signal indicator actuation, function | GF82.10-P-3008FR | ||
| Brake light actuation, function | GF82.10-P-3010FR | ||
| Backup lamp actuation, function | GF82.10-P-3011FR | ||
| Ambient illumination, function | GF82.10-P-2014FR | ||
| Substitute lights and emergency lights actuation, function | GF82.10-P-3080FR |