Light switch
Operation

Example
Left parking lamps
Right parking lamps
Position lamps, license plate lamps
and instrument lighting
Position lamps, license plate lamps
and instrument lighting
Low beams/high beams
Rear fog lamp
Fog lamps
[1]
You can switch the turn signals and high beams on and off, and flash the headlamps, using the turn signal lever.
If the battery discharges heavily, the position lamps and parking lamps switch off automatically to ensure the engine can be started next time. Always park the vehicle in a safe, sufficiently lit place in accordance with legal requirements. Avoid using the position lamps
for several hours. If possible, switch on the right parking lamps
or left
. The exterior lighting (except for the position lamps/parking lamps) switches off automatically when
- you remove the key from the ignition switch
- you open the driver's door while the key is in position 0 in the ignition switch
If you hear a warning signal when leaving the vehicle, the lighting may still be switched on.
- Turn the light switch to
.
Low beam
- Low beams on: turn the key to position 2 in the ignition switch or start the engine.
- Turn the light switch to
.
The
indicator lamp on the instrument cluster
lights up.
Daytime running lights
You can activate or deactivate the "Daytime running lights" function via the on-board computer.
- Switching on the daytime running lights: activate the "Daytime running lights" function via the on-board computer.
- Turn the light switch to
.
When the engine is running, the daytime running lights or position lamps and low beams switch on depending on the ambient brightness.
When the low beams are switched on, the
indicator lamp on the instrument cluster
is lit.
Automatic exterior lighting
WARNINGWhen the light switch is set to
, the low beams do
not switch on automatically in fog. This can put you and other people at risk. For this reason, turn the light switch to
in fog.
Automatic exterior lighting is a function designed only to assist you. You are responsible for the lighting of your vehicle.
- Switching on automatic exterior lighting: turn the light switch to
.
Key in position 1 in the ignition switch: the position lamps switch on or off automatically depending on the ambient brightness.
When the engine is running, the daytime running lights [2] or low beams switch on or off automatically depending on the ambient brightness.
When the low beams are switched on, the
indicator lamp on the instrument cluster
is lit.
Fog lamps and rear fog lamp
Fog lamps
Only vehicles equipped with fog lamps have the fog light function.
WARNINGIf you expect fog, turn the light switch to
before setting off.
Otherwise, you may not be seen, which puts you and other people at risk.
- Switching on the fog lamps: turn the key to position 2 in the ignition switch or start the engine.
- Turn the light switch to
,
or
. - Press the button
.
The green indicator lamp on the instrument cluster lights up.
- Switching off the fog lamps: press the button
.
The green
indicator lamp on the
instrument cluster goes out.
Rear fog lamp
- Switching on the rear fog lamp: turn the key to position 2 in the ignition switch or start the engine.
- Turn the light switch to
or on
. - Press the button
.
The orange
indicator lamp on the
instrument cluster lights up.
- Switching off the rear fog lamp: press the button
.
The orange indicator light on the instrument cluster goes out.
Vehicles with fog lamps: when the light switch is set to
, the rear fog lamp can only be switched on if the fog lamps are on (without low beam headlamps).
Headlamp levelling control (halogen headlamps)
The headlamp levelling control adjusts the headlamp range to the vehicle load.

Headlamp levelling control
0 Driver's seat and front passenger seat occupied 1 Driver's seat, front passenger seat and rear seats occupied 2 Driver's seat, front passenger seat and rear seats occupied, load in luggage compartment 3 Driver's seat and front passenger seat occupied and maximum permitted load on rear axle reached (e.g. when towing a trailer)
- Start the engine.
- Turn the headlamp levelling dial to the setting that matches the vehicle's load condition.
Headlamp washer
The headlamps are cleaned automatically when you actuate the windshield washer function 5 times while the lights are on and the engine is running. The system is reset and the counter is set to zero when you switch off the ignition.
Test yourself
A quick Mercedes-Benz B-Class quiz: every answer comes with an explanation and a link to the manual page.