Exterior lights, function

The exterior lighting equipment

 front lamp units,

 tail lights,

 the license plate lamps,

 center high-mounted stop lamp,

 the turn signal lamps,

are no longer actuated with voltage direct from their controls.

The switch positions of the controls are first read by the assigned control modules and transmitted as signals to the data bus.

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Assignment of controls and control modules:

 Exterior lamp switch S1 N10/6left front SAM control module

 Combination switch (S4)  steering column module (N80)

 Hazard warning system switch (N72/1s5)  Upper control panel control module (N72/1)

 Stop lamp switch (S9/1)  Traction systems control
module (N47).

 The backup lamp signal is transmitted from the electronic selector lever module control module (N15/5) directly on the data bus.

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The data bus signals for the exterior lights are received by

 the left front SAM control module (N10/6),

 the right front SAM control module (N10/7),

 rear SAM control module (N10/8),

 the left front door control module (N69/1),

 the right front door control module (N69/2)

where they are evaluated and converted into appropriate voltage signals for the lights.

An exception to this is the actuation of the stop lamps, as these are actuated via the data bus and additionally via a direct line. The direct line is intended to prevent any time delay in switching on the stop lamps.

On vehicles with trailer hitch, the trailer recognition control module (N28/1) uses the data bus signals of the vehicle exterior lights to actuate the trailer illumination.