Automatic headlamp actuation, function - GF82.10-P-3003T

MODEL 211.0/2 up to 31.5.06 except CODE (494) USA version except CODE (498) Japan version

MODEL 211.0/2 up to 30.6.06 with CODE (494) USA version with CODE (498) Japan version

Networking of components, shown on model 211.0 without code (614) Bi-xenon headlamp unit

Fig 1: Networking Of Automatic Headlamp Actuation Components - Shown On Model 211.0 Without Code (614) Bi-Xenon Headlamp Unit

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

By monitoring the rain/light sensor (B38/2) and the combination switch (S4), the overhead control panel control unit (N70) can actuate the automatic driving light actuation in rain or snow. The rain/light sensor (B38/2) monitors the intensity of the daylight and the light conditions in the direction of travel.

Function requirements:

The rotary light switch (S1) is in position "Auto".

Function at start of journey (in darkness)

With the key removed Exterior lights "Off"
Circuit 15C Exterior lights "Off"
Circuit 15R Standing lamps "ON"
Circuit 15 Standing lamps "ON"
Terminal 61 Standing lamp and low beam (high beam permissible) "On"

Function at end of journey (in darkness)

Terminal 61 Standing lamp and low beam (high beam permissible) "On"
Circuit 15 Standing lamp and low beam (high beam permissible) "On"
Circuit 15R Standing lamps "ON"
Circuit 15C Standing lamps "ON"
Key removed Exterior lights "Off"

Function when driving using the example of driving through a tunnel

The rain/light sensor (B38/2) reports the dark tunnel entrance to the overhead control panel control unit (N70) and transmits "darkness, driving lights On" to the driver-side SAM control unit with fuse and relay module (N10/1) via CAN class B.

The CAN message is relayed via CAN class B to the passenger-side SAM control unit (N10/11) and to the rear SAM control unit with fuse and relay module (N10/2). The driver-side SAM control unit with fuse and relay module (N10/1) actuates the standing lamp, low beam and high beam in the left front lamp unit (E1). The passenger-side SAM control unit (N10/11) actuates the standing lamp as well as the low beam or high beam in the right front lamp unit (E2).

The actuation of the low beam or high beam depends on the position of the combination switch (S4).

The rear SAM control unit with fuse and relay module (N10/2) actuates the taillamps in the left taillamp (E3) and the right taillamp (E4) as well as (in model 211.0 only) the left license plate lamp (E19/1) and the right license plate lamp (E19/2). In model 211.2 the left license plate lamp (E19/1) and the right license plate lamp (E19/2) are actuated via the rear door control unit (N111). The rain/light sensor (B38/2) remains active in the tunnel and once there is a sufficient level of daylight at the tunnel exit, it initiates the automatic switching off of the driving lights.

On vehicles with code (550) Trailer hitch, the signal from CAN class B is also transmitted to the trailer connection unit [AAG] control unit (N28/1), which applies the signal to the trailer hitch socket (13-pin) (X58).

Driver-side SAM control unit with fuse and relay module, location/task/design		GF54.21-P-4109T
Front passenger-side SAM control unit with fuse and relay module, location/task/design		GF54.21-P-4111T
Rear SAM control unit with fuse and relay module, location/task	Model 211.0	GF54.21-P-4130T
	Model 211.2	GF54.21-P-4130TA
Overhead control panel control unit, location/task/design		GF82.20-P-4110T
Rain/light sensor location/task/function		GF54.21-P-4123Q
Steering column module, location/task		GF54.21-P-4125T
Rotary light switch module, location/task/design		GF82.10-P-4104T
Trailer recognition control unit, location/task	With code (550) Trailer hitch	GF82.10-P-2106T