Rear fog lamp actuation, function - GF82.10-P-3007GR

MODEL 166 up to model year 2016 

Function requirements, general 

• No overvoltage or undervoltage
• Low beam ON

During the rear fog light actuation, the low beams actuation is active; this is described in the separate "Driving lights actuation, function" document.

Rear fog light actuation, general 

The rear fog light actuation is used for marking the vehicle rear area during poor weather conditions.

Rear fog light actuation function sequence 

The rear fog light actuation is requested by pressing the rear fog light button (S1s10) on the exterior lights switch (S1).

The SAM control unit (N10) reads in the status of the rear fog light button directly and actuates the left rear fog light (E3/1e5) in the inner left rear lamp unit (E3/1) or right rear fog light (E4/1e5) in the inner right rear lamp unit (E4/1) according to the country coding.

The active rear fog light actuation is indicated visually to the driver. To do so, the SAM control unit sends the "Rear fog light indicator lamp On" request via interior CAN (CAN B) to the instrument cluster (A1), which then actuates the rear fog light indicator lamp (A1e18). In vehicles with CODE 550 (Trailer hitch) and except CODE 460 (Canada version) and except CODE 494 (USA version), the SAM control unit sends the "Rear fog light ON" signal over the interior CAN to the trailer recognition control unit (N28/1), which then actuates the rear fog light on the trailer through the trailer socket (X58).

The rear fog light on the vehicle is not actuated during trailer operation. For this, the trailer recognition control unit sends the status "Trailer recognized" via interior CAN to the SAM control unit.