Automatic headlamp mode
To switch on automatic
headlamp
mode: turn the light switch to 
or 
.
SmartKey in position 1 in the ignition lock:
the parking lamps are switched on or off
automatically depending on the brightness
of the ambient light.
With the engine running: depending on the
brightness of the ambient light, the daytime
running lamps or the low-beam headlamps
are switched on or off automatically.
When the low-beam headlamps are
switched on, the 
indicator lamp in
the
instrument cluster lights up.
WARNING
If the light switch is set to
or , the
low-beam headlamps will not come on
automatically if it is foggy. This could
endanger you and others. Therefore, turn the
light switch to in fog.
The automatic headlamp feature is only an
aid. The driver is responsible for the vehicle's
lighting at all times.
See also:
Vehicle data, GL 550
The data stated here refers specifically to a
vehicle with standard equipment. Consult an
authorized Mercedes-Benz Center for the
data for all vehicle variants and trim levels.
...
Adjusting the head restraints manually
Adjusting the head restraint height
The head restraints must only
be removed
at a qualified specialist workshop.
Mercedes-Benz recommends that you use
a Mercedes-Benz Center for this purpose. ...
Drinking and driving
WARNING
Drinking and driving and/or taking drugs and
driving are very dangerous combinations.
Even a small amount of alcohol or drugs can
affect your reflexes, perceptions and
judgment.
The ...