Exterior lights function - GF82.10-P-0003RF
Model 205, 253
Headlamp range adjustment reference
The headlamp range adjustment is installed in vehicles that do not have any of the following equipment features:
Vehicle with halogen headlamps
- Code 460 (Canada version)
- Code 494 (USA version)
- Air suspension (model 205 with CODE 483 (ADVANCED AGILITY package) and CODE 489 (AIRMATIC), model 253 with CODE 489 (AIR BODY CONTROL))
Vehicle with LED headlamps (static)
- Code 460 (Canada version)
- Code 494 (USA version)
- Air suspension (model 205 with CODE 483 (ADVANCED AGILITY package) and CODE 489 (AIRMATIC), model 253 with CODE 489 (AIR BODY CONTROL))
Vehicle with LED headlamps (dynamic)
- Air suspension (model 205 with CODE 483 (ADVANCED AGILITY package) and CODE 489 (AIRMATIC), model 253 with CODE 489 (AIR BODY CONTROL))
In the following illustration legends, all the components that are relevant for headlamp range adjustment or air suspension are shown with the note "Headlamp range adjustment" or "Air suspension".
Except CODE 631 (Static left-hand traffic LED headlamp) and except CODE 632 (Static right-hand traffic LED headlamp) and except CODE 640 (High Performance LED) and except CODE 641 (DYNAMIC LEFT-HAND TRAFFIC LED HEADLAMP) and except CODE 642 (DYNAMIC RIGHT-HAND TRAFFIC LED HEADLAMP)
With CODE 631 (Static left-hand traffic LED headlamp) or CODE 632 (Static right-hand traffic LED headlamp)
Model 205 with code 640 (High performance LED) or code 641 (Dynamic left-hand traffic LED headlamp) or code 642 (Dynamic right-hand traffic LED headlamp)
Model 253 with code 640 (High performance LED) or code 641 (Dynamic left-hand traffic LED headlamp) or code 642 (Dynamic right-hand traffic LED headlamp)
Function requirements, general
- Terminal 30 ON
Exterior lights, general
The exterior lights control all the safety and comfort-relevant functions of the front, side and rear lights of the vehicle.
When the transport mode is active, only the basic exterior lights function can be used.
Functions such as the Intelligent Light System or the Adaptive Highbeam Assist (with CODE 640 (High Performance LED) or CODE 641 (DYNAMIC LEFT-HAND TRAFFIC LED HEADLAMP, or CODE (642) DYNAMIC RIGHT-HAND TRAFFIC LED HEADLAMP) are deactivated during transport mode.
A differentiation is made between the following versions of the front lamp units in accordance with the vehicle equipment:
- Halogen headlamps
(Except CODE 631 (Static left-hand traffic LED headlamp) and except CODE 632 (Static right-hand traffic LED headlamp) and except CODE 640 (High Performance LED) and except CODE 641 (DYNAMIC LEFT-HAND TRAFFIC LED HEADLAMP) and except CODE 642 (DYNAMIC RIGHT-HAND TRAFFIC LED HEADLAMP))
- LED headlamp (static)
(With CODE 631 (Static left-hand traffic LED headlamp) or CODE 632 (Static right-hand traffic LED headlamp))
- LED headlamp (dynamic)
(With CODE 640 (High Performance LED) or CODE 641 (DYNAMIC LEFT-HAND TRAFFIC LED HEADLAMP) or CODE 642 (DYNAMIC RIGHT-HAND TRAFFIC LED HEADLAMP))
The exterior lights include the following subfunctions:
- Function sequence for thermal management of front lamp unit (LED headlamp (dynamic))
- Function sequence for increasing on-board electrical system voltage (halogen headlamps)
- Function sequence for switching off the exterior lights
Further functions are described in separate information:
- 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 with additional functions, via wiper activities)
- Headlamp range adjustment (HRA)
- Intelligent Light System function (LED headlamp (dynamic))
- Cornering illumination
- Active curve illumination
- Active light distribution (motorway lights, extended fog light function) (with CODE 641 (Dynamic left-hand traffic LED headlamp) or CODE 642 (Dynamic right-hand traffic LED headlamp))
- Adaptive Highbeam Assist function (LED headlamp (dynamic))
- Optical headlamp range adjustment
- Automatic high beams
- Partial high beam (with CODE 641 (DYNAMIC LEFT-HAND TRAFFIC LED HEADLAMP) or CODE 642 (DYNAMIC RIGHT-HAND TRAFFIC LED HEADLAMP))
- 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
- Headlamp switch-off delay, function
- Ambient illumination (external OFF delay function)
- Locator lighting (AFB)
- Substitute lamp control/emergency light actuation function
Function sequence for thermal management of front lamp unit (LED headlamp (dynamic))
The front lamp units have temperature sensors that are used to sense the heat development in the areas actuated by the LED. If the LED or the plastic housings for the front lamp units threaten to overheat as a consequence of excessively high outside temperatures or high actuation currents, the actuating currents of the LEDs are reduced, thereby lowering the heat development. The headlamp control units evaluate the signals from five temperature sensors each. The front actuation modules, LED exterior lighting evaluate the signals of three temperature sensors each.
The following components are integrated into the front lamp units for active ventilation:
- Fan motor 1, left front lamp unit, actuated by left headlamp control unit
- Fan motor 2, left front lamp unit, actuated by left front actuation module, LED exterior lighting
- Fan motor 1, right front lamp unit, actuated by right headlamp control unit
- Fan motor 2, right front lamp unit, actuated by right front actuation module, LED exterior lighting
Both fan motors are always actuated by a front lamp unit. The fan motors are actuated either immediately or with a delay depending on which particular light function is active. The active ventilation through actuation of the fan motors is used in addition to defogging or de-icing the front lamp units at low outside temperatures.
Function sequence for increasing on-board electrical system voltage (halogen headlamps)
When the on-board electrical system voltage is decreased by the energy management below the minimum voltage of a light function during normal driving operation, the front SAM control unit can suppress shutoff of the corresponding light function. For this purpose, the front SAM control unit requests the minimum voltage necessary for the corresponding light function. The light functions for which the increase of the on-board electrical system voltage is to be activated can be defined at the end of production.
The following functions can be coded:
- Actuation of low beams in dark
- Backup light actuation
- Rear fog lights actuation
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 auto on/off driving lights, the daytime running lights (only in vehicles with code 498 (Japan version)) or manually via the exterior lights switch and are switched off with circuit 15 OFF if the engine was previously turned off and the vehicle speed is v < 3 km/h.
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 circuit 15C ON or if the driver door is closed when circuit 15C is switched off, the standing light is switched off.
If 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 lights remain on for the configured period from the point at which the last door, the trunk lid or the liftgate was closed. The "Ambient illumination" function is described in detail in the separate information "Headlamp switch-off delay (SWA), function".
| Standing/parking lights actuation, function | GF82.10-P-3060RF | |
| Headlamp control, function | Model 205, 253 except code 631 (Static LED headlamps, left-hand traffic) except code 632 (Headlamps, LED, static, right-side traffic) except code 640 (High-performance LED) except code 641 (Headlamps, LED, dynamic, left-side traffic) except code 642 (Headlamps, LED, dynamic, right-side traffic) |
GF82.10-P-2009RF |
| Model 205, 253 with code 631 (Static LED headlamps, left-hand traffic) Model 205, 253 with code 632 (Headlamps, LED, static, right-side traffic) Model 205, 253 with code 640 (High-performance LED) Model 205, 253 with code 641 (Headlamps, LED, dynamic, left-side traffic) Model 205, 253 with code 642 (Headlamps, LED, dynamic, right-side traffic) |
GF82.10-P-2009RFA | |
| Function of Intelligent Light System | Model 205, 253 with code 640 (High-performance LED) Model 205, 253 with code 641 (Headlamps, LED, dynamic, left-side traffic) Model 205, 253 with code 642 (Headlamps, LED, dynamic, right-side traffic) |
GF82.10-P-3090RF |
| Function of Adaptive Highbeam Assist | Model 205, 253 with code 640 (High-performance LED) Model 205, 253 with code 641 (Headlamps, LED, dynamic, left-side traffic) Model 205, 253 with code 642 (Headlamps, LED, dynamic, right-side traffic) |
GF82.10-P-3091RF |
| Front fog light actuation, function | GF82.10-P-3070RF | |
| Turn signal indicator actuation, function | GF82.10-P-3008RF | |
| Brake light actuation, function | GF82.10-P-3010RF | |
| Backup lamp actuation, function | GF82.10-P-3011RF | |
| Headlight switch off delay function | GF82.10-P-2011RF | |
| Substitute lights and emergency lights actuation, function | GF82.10-P-3080RF |