Front fog light actuation, function - GF82.10-P-3070FLM

MODEL 212 as of model year 2014 without CODE 460 (Canada version) 

MODEL 212 as of model year 2014 without CODE 494 (US version) 

Function requirements for front fog light actuation, general 

• No overvoltage or undervoltage (operating voltage range U ≥ 7 ≤ 17.5 V)
• Terminal 15 ON
• Exterior lights switch (S1) in "AUTO" position
• Low beam ON

The electronic ignition switch control unit (N73) sends the status of circuit 15 to the front SAM control unit with fuse and relay module (N10/1) via interior CAN (CAN B).

Front fog light actuation, general 

Front fog light actuation enables better identification of the rear of the vehicle in poor weather conditions.

During front fog light actuation standing/parking lights actuation is also active, which is described in a separate document.

Function sequence for front fog light actuation 

The rear fog light actuation is requested by pressing the rear fog light button (S1s10) on the exterior lights switch.

The front SAM control unit reads in the status of the rear fog light button directly and sends the request to switch on the rear fog light via interior CAN to the rear SAM control unit with fuse and relay module (N10/2) and the trailer recognition control unit (N28/1) (with code (550) Trailer hitch).

The rear SAM control unit then actuates the left rear fog light (E3/1e5) in the inner left rear lamp unit (E3/1) or the right rear fog light (E4/1e5) in the inner right rear lamp unit (E4/1) according to the national code. The trailer recognition control unit (with code (550) Trailer hitch) actuates the rear fog light on the trailer via the trailer socket (X58).

The rear fog light on the vehicle is not actuated during trailer operation. For this purpose, the trailer recognition control unit sends a corresponding signal with the information "Operational rear fog lamp exists on trailer" via interior CAN to the rear SAM control unit.

The active rear fog light actuation is indicated visually to the driver. To do so, the front SAM control unit sends the "Rear fog light indicator lamp On" request via interior CAN to the instrument cluster (A1), which then actuates the rear fog light indicator lamp (A1e18).

	Electrical function schematic for front fog light actuation		PE82.10-P-2056-97DAB
	Overview of exterior lights system components		GF82.10-P-9998FLM