Exterior Lights Function - GF82.10-P-0003FH

Model 238 

Up To Model Year 2021 

Courtesy of MERCEDES-BENZ USA

Except code 631 (Static left-hand traffic LED headlamp) and except code 632 (Static right-hand traffic LED headlamp) and except code P35 (Light package) 

Courtesy of MERCEDES-BENZ USA

With CODE 631 (Static left-hand traffic LED headlamp) or CODE 632 (Static right-hand traffic LED headlamp) 

Courtesy of MERCEDES-BENZ USA

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.

  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.

• 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:

• Lamp unit in halogen design 

  (Except code 631 (Static left-hand traffic LED headlamp) and except code 632 (Static right-hand traffic LED headlamp) and except code P35 (Light package))

• Static LED version lamp unit 

  (With CODE 631 (Static left-hand traffic LED headlamp) or CODE 632 (Static right-hand traffic LED headlamp))

• Dynamic LED version lamp unit 

  (With code P35 (Light package))

The exterior lights contain the following functions:

• Function sequence for front lamp unit thermal management (With Code 631 (Static left-hand traffic LED headlamp) or code 632 (Static right-hand traffic LED headlamp) or code P35 (Light package)) 
• 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 front lamp unit thermal management (With Code 631 (Static left-hand traffic LED headlamp) or code 632 (Static right-hand traffic LED headlamp) or code P35 (Light package)) 

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, left front 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 can be switched on because of the auto on/off driving lights, daytime running lights (only on vehicles with code 498 (Japan version) and halogen lamp unit) or manually via 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 on vehicles with code 498 (Japan version) and LED lamp unit) 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-3060FH
	Headlamp control, function	Model 238 up to model year 2021 except code 631 (Static LED headlamps, left-hand traffic) except code 632 (Headlamps, LED, static, right-side traffic) except code P35 (Light Package)	GF82.10-P-2009FH
		Model 238 up to model year 2021 with code 631 (Static LED headlamps, left-hand traffic) Model 238 up to model year 2021 with code 632 (Headlamps, LED, static, right-side traffic) Model 238 up to model year 2021 with code P35 (Light Package)	GF82.10-P-2009FHA
	Function of Intelligent Light System	Model 238 up to model year 2021 with code P35 (Light Package)	GF82.10-P-3090FH
	Function of Adaptive Highbeam Assist	Model 238 up to model year 2021 with code P35 (Light Package)	GF82.10-P-3091FH
	Front fog light actuation, function		GF82.10-P-3070FH
	Turn signal indicator actuation, function		GF82.10-P-3008FH
	Brake light actuation, function		GF82.10-P-3010FH
	Backup lamp actuation, function		GF82.10-P-3011FH
	Ambient illumination, function		GF82.10-P-2014FH
	Substitute lights and emergency lights actuation, function		GF82.10-P-3080FH