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

Model 172.4 as of model year 2017 

Courtesy of MERCEDES-BENZ USA

Vehicle without code 640 (High Performance LED) and without code 641 (Dynamic left-hand traffic LED headlamp) and without code 642 (Dynamic right-hand traffic LED headlamp) 

Courtesy of MERCEDES-BENZ USA

Vehicles 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 (ABL), general 

The exterior lights control all the safety and comfort-relevant functions of the front, side and rear lights of the vehicle.

The exterior lights system includes the following subfunctions:

• Function sequence, on-board network increase 
• Function sequence for switching off the exterior lights 

Further subfunctions are described in separate documents:

• Standing/parking lights actuation function 
• Headlamp control function 
• Intelligent Light System function (with CODE 640 (High Performance LED) or CODE 641 (DYNAMIC LEFT-HAND TRAFFIC LED HEADLAMP) or CODE 642 (DYNAMIC RIGHT-HAND TRAFFIC LED HEADLAMP)) 
• Adaptive High Beam Assist, function (with CODE 608 (Adaptive High Beam Assist) or CODE 628 (Adaptive High Beam Assist Plus)) 
• Front fog light actuation, function 
• Turn signal light actuation function 
• Brake lights actuation function 
• Backup light actuation function 
• Headlight switch off delay function 
• Emergency light actuation function 

Function sequence, on-board network increase 

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 with the aid of the on-board electrical system increase. To do so, the front SAM control unit requests the minimum voltage required for the corresponding light function. The light functions for which the on-board electrical system increase is to be activated is defined during production.

The following functions can be coded:

• Low beam actuation in darkness (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))
• High beam actuation (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))
• Backup light actuation
• Rear fog lights actuation

Function sequence for switching off the exterior lights 

Switching off the exterior lights reduces the load on the on-board electrical system while also preventing the on-board electrical system battery (G1) from being discharged by the active standing or parking lights actuation.

The low beams may be switched on due to the auto on/off driving lights, the daytime running lights or manually via the exterior lights switch. A prerequisite for this is that the status of circuit 15 is On.

If circuit 15 is Off, the low beams are switched off.

The standing lights may be switched on because the low beams have been manually switched on, because of the auto on/off driving lights or manually via the exterior lights switch. If the standing lights have been switched on manually (exterior lights switch to the "Standing lights" position), the standing lights are not switched off.

If the standing lights have been activated because of the manually activated low beams, auto on/off driving lights or daytime running lights and the driver door is opened with the status circuit 15C On, the standing lights are switched off.

If the "Ambient illumination" function is activated via the instrument cluster, it automatically switches itself on when the engine is turned off. The low beams and the standing lights remain switched on for a fixed time interval of t = 60 s.

The ambient illumination function is described in the headlamp switch-off delay (SWA) subfunction.

	Standing/parking lights actuation, function		GF82.10-P-3060RDM
	Headlamp control, function	Model 172.4 as of model year 2017 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-2009RDM
	Headlamp control, function	Model 172.4 as of model year 2017 with code 640 (High-performance LED) with code 641 (Headlamps, LED, dynamic, left-side traffic) with code 642 (Headlamps, LED, dynamic, right-side traffic)	GF82.10-P-2009RDN
	Function of Intelligent Light System	Model 172.4 as of model year 2017 with code 640 (High-performance LED) with code 641 (Headlamps, LED, dynamic, left-side traffic) with code 642 (Headlamps, LED, dynamic, right-side traffic)	GF82.10-P-3090RDM
	Function of Adaptive High Beam Assist	Model 172.4 as of model year 2017 with code 608 (Adaptive High Beam Assist) with code 628 (Adaptive High Beam Assist Plus)	GF82.10-P-3091RDM
	Front fog light actuation, function		GF82.10-P-3070RDM
	Turn signal indicator actuation, function		GF82.10-P-3008RDM
	Brake light actuation, function		GF82.10-P-3010RDM
	Backup lamp actuation, function		GF82.10-P-3011RDM
	Headlight switch off delay function		GF82.10-P-2011RDM
	Emergency lamp control, function		GF82.10-P-3013RDM