
the driver’s door with the ignition switched
off.
When the parking lamps or the rear fog
lamp are switched on and you remove the
SmartKey from the starter switch and open
the driver’s door, an acoustic signal
sounds.
In addition the message  Switch Off 
Lights  appears in the multifunction
display.
Switch off the parking lamps or the rear fog
lamp manually.
!  Failure to switch off the parking lamps
when leaving the vehicle may result in a
discharged battery.
i Vehicles without front fog lamps: For
better detection of the vehicle, the LED
daytime running lamps are dimmed to
parking lamp level when the low-beam
headlamps are switched on.
Low-beam headlamps 
The low-beam headlamps can be switched on
and off with the exterior lamp switch.
XSwitch on the ignition.XSwitching on:  Turn the exterior lamp
switch to position  L.
The following lamps come on:
R Low-beam headlamps
R Parking lamps 5
R Green indicator lamp  L in the
instrument cluster
Automatic headlamp mode 
GWarning!
If the exterior lamp switch is set to  c, the
headlamps will not automatically come on
under foggy conditions.
To minimize risk to you and to others, activate
headlamps by turning exterior lamp switch to
L  when driving or when traffic and/or
ambient lighting conditions require you to do
so.
In low ambient lighting conditions, only switch
from position  c to L  with the vehicle
at a standstill in a safe location. Switching
from  c to L  will briefly switch off the
headlamps. Doing so while driving in low
ambient lighting conditions may result in an
accident.
The automatic headlamp feature is only an aid
to the driver. The driver is responsible for the
operation of the vehicle’s lights at all times.XSwitching on:  Turn the exterior lamp
switch to position  c.
When ambient light is low:  When the
SmartKey is in starter switch position  1 or
when the KEYLESS-GO start/stop button has
been pressed once, the parking lamps 5
 come
on automatically.
When the engine is running, the low-beam
headlamps come on additionally.
When ambient light is bright:  When the
SmartKey is in starter switch position  1 or
when the KEYLESS-GO start/stop button has
been pressed once, all lamps are off.
When the engine is running, the daytime
running lamps 6
 come on automatically.
When the low-beam headlamps are switched
on, the green indicator lamp  L in the
instrument cluster comes on.
Once the low-beam headlamps are on, the
high-beam headlamps are also available.
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.
5 When the parking lamps are on, the tail lamps, the license plate lamps, the side marker lamps, and the
instrument cluster illumination are also on.
6 USA only: The daytime running lamp mode must be activated via the control system.98LightingControls in detail
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If, after turning off the engine, you do not
open or close a door, the lamps will
automatically go out after 60 seconds.
The following lamps will come on
RParking lamps
RTail lamps
RLicense plate lamps
RSide marker lamps
RFront fog lamps
XPress button = or ; to select the
Sett. menu.
XPress button : or 9 to select the
Lights submenu.
XPress button a.XPress button : or 9 to select the
Locator Lighting: function.
The current setting Enabled or Disabled
is shown.
XPress button a to change the current
status.
Depending on the previous status, the
Locator Lighting: function will be
Enabled or Disabled.
You can temporarily deactivate the
headlamps delayed shut-off feature:
XBefore exiting the vehicle, turn the
SmartKey in the starter switch to
position 0.
XThen turn it to position 2 and back to
position 0.
The headlamps delayed shut-off feature is
deactivated. It will reactivate as soon as
you start the engine.
Setting ambient lighting
Use this function to adjust the brightness of
the ambient lighting.
XPress button = or ; to select the
Sett. menu.
XPress button : or 9 to select the
Lights submenu.
XPress button a.XPress button : or 9 to select the
Ambient Light Brightness: function.
XPress button a.XPress button : or 9 to set the
Ambient Light Brightness: .
The setting Level 1 represents the darkest
level and setting Level 5 the brightest
level. The ambient light is switched off at
setting Disabled.
Switching interior lighting delayed shut-
off on or off 
Use this function to set whether you would
like the interior lighting to remain on for
10 seconds during darkness after you have
removed the SmartKey from the starter
switch.
XPress button = or ; to select the
Sett. menu.
XPress button : or 9 to select the
Lights submenu.
XPress button a.XPress button : or 9 to select the
Interior Lighting Delay: function.
The current setting Enabled or Disabled
is shown.
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Display messagesPossible causes/consequences and M SolutionsbAuto Lamp 
Function 
Inoperativ
eThe light sensor is malfunctioning. The headlamps come on
automatically.XContact an authorized Mercedes-Benz Center as soon as
possible.
To switch off the headlamps (U.S. vehicles only):
XSwitch off the daytime running lamp mode in the control
system ( Y page 141).XSwitch off the headlamps using the exterior lamp switch
( Y  page 97).bCheck 
Left Low 
Beam
or
Check 
Right Low 
BeamThe left or right low-beam lamp is malfunctioning.XHalogen headlamp:  Replace the bulb as soon as possible
( Y  page 318).XBi-Xenon headlamp:  Contact an authorized Mercedes-
Benz Center as soon as possible.bCheck 
Rear Left 
Fog LampThe rear fog lamp is malfunctioning. This message will only
appear if all LEDs have stopped working.XContact an authorized Mercedes-Benz Center as soon as
possible.bSwitch 
Off LightsYou have removed the SmartKey from the starter switch,
opened the driver’s door and left the headlamps on or
removed the SmartKey with KEYLESS-GO from the vehicle
and left the headlamps on.XTurn the exterior lamp switch to  $ or c
( Y  page 97).
or
XWith the fog lamps switched on:  Push in the exterior
lamp switch to its stop.bCheck 
Left Tail 
and Brake 
Lamps
or
Check 
Right 
Tail and 
Brake 
LampsThe left or right tail lamp/brake lamp is malfunctioning. This
message will only appear if all LEDs have stopped working.XContact an authorized Mercedes-Benz Center as soon as
possible.302Vehicle status messages in the multifunction displayPractical hints
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XPress mechanical key ; into the SmartKey
opening until battery compartment
cover : opens. Do not keep the cover
shut.
XRemove the battery compartment cover.XPat the SmartKey against the palm of your
hand until battery = falls out.
XInsert the new battery with the positive
terminal (+) facing up. Use a lint-free cloth.
XInsert the tabs of the battery compartment
cover into the housing and press the cover
closed.
XCheck the operation of the SmartKey as
well as the KEYLESS-GO function.
Replacing bulbs
Safety notes
Safe vehicle operation depends on proper
exterior lighting and signaling to a large
degree.
Correct headlamp adjustment is extremely
important. Have headlamps checked and
readjusted at regular intervals and when a
bulb has been replaced. Contact an
authorized Mercedes-Benz Center for
headlamp adjustment.
GWarning!
Bulbs and bulb sockets can be very hot. Allow
the lamp to cool down before changing a bulb.
Keep bulbs out of reach of children.
Halogen lamps contain pressurized gas. A
bulb can explode if you
Rtouch or move it when hot
Rdrop the bulb
Rscratch the bulb
Wear eye and hand protection.
Because of high voltage in Xenon lamps, it is
dangerous to replace the bulb or repair the
lamp and its components. We recommend
that you have such work done by a qualified
technician.
iSince replacing bulbs is a technically
highly demanding process, we recommend
to have them replaced at an authorized
Mercedes-Benz Center.
iIf the headlamps or front fog lamps are
fogged up on the inside as a result of high
humidity, driving the vehicle a distance with
the lights on should clear up the fogging.
318Replacing bulbsPractical hints
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