Mercedes-Benz 2008 M-Class Operator's Manual page 138

Turn the exterior lamp switch to
position U.
With the SmartKey in starter switch
position 1 or the KEYLESS-GO*
start/stop button pressed once, only
the parking lamps and the side marker
lamps will switch on and off depending
on the brightness of the ambient light.
When the engine is running, the low
beam headlamps, the tail and parking
lamps, the license plate lamps, and the
side marker lamps will switch on and
off depending on the brightness of the
ambient light.
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Canada only:
High beam headlamps are only available with the
exterior lamp switch in position B.
Daytime running lamp mode
In Canada the daytime running lamp mode
is mandatory and therefore in a constant
mode.
In the USA the daytime running lamp mode
is deactivated by default. Activate the day-
time running lamp mode using the control
system, see "Setting daytime running lamp
mode (USA only)" ( page 170).
Turn the exterior lamp switch to
position M or U.
When the engine is running, the low
beam headlamps are switched on.
In low ambient light conditions, the
following lamps will switch on
additionally:
Tail and parking lamps
License plate lamps
Side marker lamps
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With the daytime running lamp mode
activated and the engine running, you cannot
switch off the low beam headlamps manually.
Controls in detail
Canada only
i
With the exterior lamp switch in
position M or U, you cannot switch on the
high beam headlamps.
The high beam flasher is available at all times.
For nighttime driving turn the exterior lamp
switch to position B to permit activation of
the high beam headlamps.
When the engine is running, and you shift
from a driving position to position N or P
with the vehicle at a standstill, the low
beam headlamps will switch off with a
three-minute delay.
When the engine is running, and you
turn the exterior lamp switch to
position C, the low beam head-
lamps, the tail and parking lamps, the
side marker lamps and the license
plate lamps switch on
turn the exterior lamp switch to
position B, the manual headlamp
mode has priority over the daytime
running lamp mode
Lighting
137