Low-beam headlamps
•► To switch on the low-beam headlamps:
turn the SmartKey in the ignition lock to position 2 or start the engine.
•► Turn the light switch to 
.
The indicator lamp in the instrument
cluster lights up.
See also:
Vehicle data, GL 450
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.
...
Problems with the sliding sunroof
Your vehicle may be equipped with a sliding
sunroof or a panorama roof with power tilt/
sliding panel. In the following section, the
term "sliding sunroof" refers to both types of
sl ...
Problems with the seat heating
The seat heating has switched off
prematurely or cannot be switched on. The
vehicle's electrical system voltage is too low
because too many electrical consumers are
switched on.
- Switch off ...