Mercedes-Benz 2008 R 320 CDI 4MATIC Operator's Manual page 150

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The corner-illuminating front fog lamps tem-
porarily come on both sides of the vehicle if you
turn the steering wheel in one direction and then
again in the other direction shortly thereafter.
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The corner-illuminating front fog lamps will
come on automatically depending on the steer-
ing angle, even if you did not switch on either
turn signal. If the corner-illuminating front fog
lamps came on automatically, they will also go
out automatically depending on the steering
angle.
Switching off corner-illuminating front
fog lamps
The combination switch for the turn signal
resets automatically after major steering
wheel movements. This will switch off the
corner-illuminating front fog lamps if they
were activated by switching on the left or
right turn signal.
If the turn signal should stay on after
making the turn, the turn signal and
corner-illuminating front fog lamps can be
switched off by returning the combination
switch to its original position.
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There may be a brief delay before the
corner-illuminating front fog lamps switch off.
Controls in detail
Driving in reverse
Switching on corner-illuminating front
fog lamps
Shift the automatic transmission to
reverse gear R ( page 192).
The front fog lamp opposite to your
steering direction comes on.
Switching off corner-illuminating front
fog lamps
Shift the automatic transmission
to a gear other than reverse
gear R ( page 190).
The respective front fog lamp goes out.
Lighting
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