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Home >> Mercedes Benz >> 2008 >> SLK280 Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Electrical System - Body - 171 Chassis >> Basic Knowledge (-2008) >> Low-beams actuation, function - GF82.10-P-3002 >> Low-beams actuation, function (except code 614) - GF82.10-P-3002SK

Low-beams actuation, function (except code 614) - GF82.10-P-3002SK

MODEL 171.4 except CODE (614) Bi-xenon headlamp unit 

Fig 1: Low-Beams Actuation Function Chart
G05030513Courtesy of MERCEDES-BENZ USA

Manual request 

Function requirements:

The actuation of the exterior lamp switch (S1) is read in by the driver-side SAM control unit with fuse and relay module (N10/1) via a discrete line. It actuates the following lamps via discrete wiring:

The driver-side SAM control unit with fuse and relay module (N10/1) transmits the message for switching the rear lamps on to the rear SAM control unit with fuse and relay module (N10/2) via the Controller Area Network Bus Class B (interior) (CAN-B).

The rear SAM control unit with fuse and relay module (N10/2) actuates the following lamps via discrete wiring:

Automatic driving light 

Function requirements:

The actuation of the exterior lamp switch (S1) is read in by the driver-side SAM control unit with fuse and relay module (N10/1) via a discrete line. To switch the illumination on, the driver-side SAM control unit with fuse and relay module (N10/1) additionally requires the "night" message. The "night" message is generated by the rain/ light sensor (B38/2).

It is read in by the overhead control panel control unit (N70) and transmitted via CAN-B. The driver-side SAM control unit with fuse and relay module (N10/1) actuates the following lamps via discrete wiring:

The driver-side SAM control unit with fuse and relay module (N10/1) transmits the message for switching the rear lamps on to the rear SAM control unit with fuse and relay module (N10/2) via CAN-B. It actuates the following lamps via discrete wiring:

Daytime running lamps 

Function requirements:

The driver-side SAM control unit with fuse and relay module (N10/1) requires the "daytime running lamps active" message, which it receives from the instrument cluster (A1) via CAN-B. Additionally, the driver-side SAM control unit with fuse and relay module (N10/1) requires the "circuit 61 ON" message, which arrives from the EIS control unit (N73) via CAN-B. The driver-side SAM control unit with fuse and relay module (N10/1) actuates the following lamps via discrete wiring:

The driver-side SAM control unit with fuse and relay module (N10/1) transmits the message for switching the rear lamps on to the rear SAM control unit with fuse and relay module (N10/2) via CAN-B.

The rear SAM control unit with fuse and relay module (N10/2) actuates the following lamps via discrete wiring:

Exterior lamp switch module, location/ function/design GF82.10-P-4104SK 
Lamp unit, location/task GF82.10-P-4010SK 
Driver-side SAM control unit with fuse and relay module, location/task/design GF54.21-P-4109SK
Instrument cluster (IC), location / task GF54.30-P-3039SK