Mercedes-Benz GL-Class 2012 Owners Manual - Manual (Page 122)

The automatic headlamp feature is only an
aid. The driver is responsible for the vehicle's
lighting at all times.
G WARNING
In low ambient lighting or foggy conditions,
only switch from position à to L with
the vehicle at a standstill in a safe location.
Switching from à to L will briefly
switch off the headlamps. Doing so while
driving in low ambient lighting conditions may
result in an accident.
Front fog lamps and rear fog lamp
Front fog lamps
Only vehicles with front fog lamps have the
"fog lamps" function.
G WARNING
If you suspect that driving conditions will be
foggy, turn the light switch to L before you
start your journey. Otherwise, your vehicle
may not be visible and you could endanger
yourself and others.
G WARNING
In low ambient lighting or foggy conditions,
only switch from position à to L with
the vehicle at a standstill in a safe location.
Switching from à to L will briefly
switch off the headlamps. Doing so while
driving in low ambient lighting conditions may
result in an accident.
X To switch on the front fog lamps: turn
the SmartKey in the ignition lock to position
2 or start the engine.
X Turn the light switch to L or T. If the
light switch is set to Ã, you cannot
switch on the fog lamps.
X Pull the light switch out to the first detent.
The green N indicator lamp on the light
switch lights up.
X To switch off the front fog lamps: press
the light switch in as far as it will go.
The green N indicator lamp on the light
switch goes out.
Rear fog lamp
X To switch on (vehicles with front fog
lamps): turn the SmartKey in the ignition
lock to position 2 or start the engine.
X Turn the light switch to L or T. When
the light switch is set to Ã, you cannot
switch on the rear fog lamp.
X Pull the light switch out to the second stop.
The yellow R indicator lamp on the light
switch lights up.
X To switch off the rear fog lamp: press the
light switch in as far as it will go.
The yellow R indicator lamp on the light
switch goes out.
X To switch on (vehicles without front fog
lamps): turn the SmartKey in the ignition
lock to position 2 or start the engine.
X Turn the light switch to L. When the
light switch is set to Ã, you cannot
switch on the rear fog lamp.
X Turn the light switch to L. When the
light switch is set to c, you cannot
switch on the rear fog lamp.
X Pull the light switch out to the stop.
The yellow R indicator lamp on the light
switch lights up.
X Pull the light switch out to the stop.
The yellow R indicator lamp in the
instrument cluster lights up.
120
Exterior lighting
Lights and windshield wipers