Headlamp switch-off delay, function

Function

The headlamp switch-off delay serves to illuminate the area surrounding the vehicle after exiting the vehicle.

The time interval can be adjusted in the instrument cluster (A1).

 The time interval can set in 15 s increments from

t = 0 s to t = 60 s

Function requirements:

 Headlamp switch-off delay activated via instrument cluster

 Rain/light sensor (B38/2) signals "Darkness"

 Rotary light switch (S1) in "AUTO" position (with and )

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Function sequence

When changing from circuit 61 ON to circuit 15 OFF, the headlamp switch-off delay function is activated for t = 60 s, if the function prerequisites are fulfilled.

This time is independent from the time interval set in the instrument cluster.

When a door or the rear-end door is opened, the time for the headlamp switch-off delay is restarted. This applies each time a door is opened within the expiration time. When the last door is closed, the time interval selected in the instrument cluster is activated.

If the headlamp switch-off delay is active, the front SAM control unit (N10) transmits the corresponding signal to the instrument cluster, whereupon the warning buzzer (A1h1) and circuit 58d are suppressed.

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When the parking lamp or the low beam is only activated due to the rotary light switch in the background of the headlamp switch-off delay, the warning buzzer remains activated.

The headlamp switch-off delay activates the following lamps:

 Left standing and parking lamp (E6/13)

 Right standing and parking lamp (E6/14)

 Left front fog lamp (E5/1)

 Right fog lamp (E5/2)

 Left front side-marker lamp  (E6/1)
(with  and )

 Right front side-marker lamp  (E6/2)
(with  and )

 Left stop lamp, taillamp, parking lamp, and side-marker lamp (E3e9)

 Right stop lamp, taillamp, parking lamp and side-marker lamp (E4e9)

 Left tailgate license plate lamp (E19/3)

 Right tailgate license plate lamp (E19/4)

Interrupt function

When the ignition is switched on and off, the headlamp switch-off delay function is interrupted until the next change from circuit 61 ON to circuit 15 OFF.

 When the anti-theft alarm system (with code (551) Anti-theft alarm system (ATA)) is triggered, the headlamp switch-off delay is also interrupted.

Deactivate function

When the time interval is set to "0 s" in the instrument cluster the headlamp switch-off delay feature is deactivated.