Daytime running light control, function - GF82.10-P-3005SKX

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

Fig 1: Daytime Running Light Control Function Chart

Courtesy of MERCEDES-BENZ USA

Function requirements:

The exterior light switch (S1) is in position "0".
The "light actuation for driving lamps" function is set to "continuous" in the instrument cluster (A1), or is permanently preset ex works due to legal regulations in the national versions and cannot be deactivated.
Circuit 61 ON

Function

The instrument cluster (A1) transmits, as soon as "circuit 61 ON" is present, the "daytime running lamps ON" message to the driver-side SAM control unit with fuse and relay module (N10/1) via the Controller Area Network Bus Class B (interior) (CAN-B). The driver-side SAM control unit with fuse and relay module (N10/1) receives this message and actuates the xenon headlamp control unit (E1n1) and the xenon headlamp control unit (E2n1).

The xenon headlamp control unit (E1n1) and the xenon headlamp control unit (E2n1) switch on the following lamps:

Left low beam (E1e2)
Right low beam (E2e2)

The driver-side SAM control unit with fuse and relay module (N10/1) switches on the following lamps:

Left standing and parking lamp (E1e3)
Right standing and parking lamp (E2e3)

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:

Left stop lamp, taillamp and parking lamp (E3e9)
Right stop lamp, taillamp and parking lamp (E4e9)
Left license plate lamp (E19/1)
Right license plate lamp (E19/2)

The daytime running lamps have a higher priority than the automatic driving lights of the rain/light sensor (B38/2).

In those countries with a statutory daytime running light regulation, only the headlamp flasher is permitted in daytime running lights mode, and not the high beam.

Exterior lamp switch module, location/ function/design	GF82.10-P-4104SKX
Instrument cluster (IC), location / task	GF54.30-P-3039SK
Driver-side SAM control unit with fuse and relay module, location/task/design	GF54.21-P-4109SK
Rear SAM control unit with fuse and relay module, location/task	GF54.21-P-4130SK