Page 129 of 514

128 Controls in detailLightingManual headlamp mode
The low beam headlamps and the parking
lamps can be switched on and off with the
exterior lamp switch.
Automatic headlamp mode
The following lamps switch on and off au-
tomatically depending on the brightness of
the ambient light:
Low beam headlamps
Tail and parking lamps
License plate lamps
Side marker lamps
Turn the exterior lamp switch to
positionU.
With the SmartKey in starter switch
position1 or the KEYLESS-GO*
start/stop button pressed once, only
the parking lamps will switch on and off
automatically.
When the engine is running, the low
beam headlamps, the tail and parking
lamps, the license plate lamps, and the
side marker lamps will switch on and
off automatically.
iWith the SmartKey removed from the
starter switch or the engine turned off
with KEYLESS-GO* and the driver’s
door open, a warning sounds if the
parking lamps or low beam headlamps
are switched on.
The message
Turn off lamps
appears
in the multifunction display.
Warning!
G
If the exterior lamp switch is set toU,
the headlamps may switch off unexpect-
edly when the system senses bright
ambient light, for example light from
oncoming traffic.
the headlamps will not be automatically
switched on under foggy conditions.
To minimize risk to you and to others,
activate headlamps by turning exterior lamp
switch to B when driving or when traffic
and / or ambient lighting conditions require
you to do so.
In low ambient lighting conditions, only
switch from position U to B with the
vehicle at a standstill in a safe location.
Switching from U to B 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.
Page 130 of 514

129 Controls in detail
Lighting
Daytime running lamp mode
Turn the exterior lamp switch to
positionM orU.
When the engine is running, the low beam
headlamps are switched on.
In low ambient light conditions, the
following lamps will switch on additionally:
Tail and parking lamps
License plate lamps
Side marker lamps
For nighttime driving you should turn the
exterior lamp switch to positionB to
permit activation of the high beam head-
lamps.Canada only
The daytime running lamp mode is manda-
tory and therefore in a constant mode.
When the engine is running, and you shift
from a driving position to positionN orP,
the low beam headlamps will switch off
with a three-minute delay.
When the engine is running, and you
turn the exterior lamp switch to
positionC, the parking lamps
switch on additionally.
turn the exterior lamp switch to
positionB, the manual headlamp
mode has priority over the daytime
running lamp mode.
The corresponding exterior lamps
switch on (
page 127).USA only
By default, the daytime running lamp mode
is deactivated. Activate the daytime run-
ning lamp mode using the control system,
see “Setting daytime running lamp mode
(USA only)” (
page 156).
When the engine is running, and you turn
the exterior lamp switch to positionC
orB, the manual headlamp mode has
priority over the daytime running lamp
mode.
The corresponding exterior lamps switch
on (
page 127).
Locator lighting and night security
illumination
The locator lighting and the night security
illumination are described in the “Control
system” section, see “Setting locator light-
ing” (page 157) and “Setting night secu-
rity illumination” (
page 158).
iWith the daytime running lamp mode
activated and the exterior lamp switch
in positionM, the high beam head-
lamps cannot be switched on.
The high beam flasher is available at all
times.
Page 131 of 514

130 Controls in detailLightingFog lampsFront fog lamps
Switch on the low beam headlamps
(page 52).
Pull out the exterior lamp switch to first
stop.
The front fog lamps switch on.
The green indicator lamp‡ in the
exterior lamp switch comes on
(page 127).
Push in the exterior lamp switch.
The front fog lamps switch off.
The green indicator lamp‡ in the
exterior lamp switch goes out.
Warning!
G
In low ambient lighting or foggy conditions,
only switch from position U to B with
the vehicle at a standstill in a safe location.
Switching fromU to B will briefly
switch off the headlamps. Doing so while
driving in low ambient lighting conditions
may result in an accident.iFog lamps will operate with the parking
lamps and/or the low beam headlamps
on. Fog lamps should only be used in
conjunction with low beam headlamps.
Consult your State or Province Motor
Vehicle Regulations regarding permis-
sible lamp operation.
iFog lamps cannot be switched on with
the exterior lamp switch in
positionU. For switching on the fog
lamps, turn the exterior lamp switch to
positionB first.
Page 132 of 514

131 Controls in detail
Lighting
Rear fog lamp (driver’s side only)
Switch on the front fog lamps
(page 130).
Pull out the exterior lamp switch to
second stop.
The rear fog lamp is switched on.
The yellow indicator lamp† in the
exterior lamp switch comes on
(page 127).
Push in the exterior lamp switch to first
stop.
The rear fog lamp switches off.
The yellow indicator lamp† in the
exterior lamp switch goes out.
The front fog lamps remain lit.
Combination switch
The combination switch is located on the
left of the steering column.Combination switch1High beam
2High beam flasherHigh beam
Turn the exterior lamp switch to
positionB orU (
page 127).
Push the combination switch in
direction of arrow1 to switch on the
high beam.
The high beam headlamp indicator
lampA in the instrument cluster
comes on (
page 24).
Pull the combination switch in direction
of arrow2 to its original position to
switch off the high beam.
The high beam headlamp indicator
lampA in the instrument cluster
goes out.
High beam flasher
Pull the combination switch briefly in
direction of arrow2.
Page 133 of 514

132 Controls in detailLightingCorner-illuminating front fog lamps* (CLK with Bi-Xenon* headlamps)
The corner-illuminating front fog lamps im-
prove illumination of the road into which
you are turning.
The corner-illuminating front fog lamps will
operate with the engine running and with
the exterior lamp switch in
positionB (
page 127)
or
the exterior lamp switch in
positionU (
page 127)
or
the daytime running lamp mode
activated (
page 129)Driving forward
Switching on corner-illuminating front
fog lamps
Depending on whether you are turning
left or right, switch on the left or right
turn signal (
page 53).
The respective front fog lamp comes on
and illuminates the road onto which
you are turning.Switching off corner-illuminating front
fog lamps
The combination switch for the turn signal
resets automatically after major steering
wheel movements. This will switch off the
corner-illuminating front fog lamps if they
where activated by switching on the left or
right turn signal.
If the turn signal should stay on after mak-
ing the turn, the turn signal and corner-illu-
minating front fog lamps can be switched
off by returning the combination switch to
its original position.
iCorner-illuminating front fog lamps will
only come on in low ambient lighting
conditions.
The corner-illuminating front fog lamps
function is not available at a vehicle
speed above 25 mph (40 km/h).
iThe corner-illuminating front fog lamps
will come on automatically depending
on the steering angle, even if you did
not switch on either turn signal.
If the corner-illuminating front fog
lamps came on automatically, they will
also go out automatically depending on
the steering angle.
Page 134 of 514

133 Controls in detail
Lighting
Driving rearward
Switching on corner-illuminating front
fog lamps
Place the gear selector lever in
positionR.
The inverse front fog lamp comes on
automatically depending on the steer-
ing direction and steering angle.
Switching off corner-illuminating front
fog lamps
Place the gear selector lever out of
positionR.
The respective front fog lamp goes out.
Hazard warning flasher
The hazard warning flasher can be
switched on at all times, even with the
SmartKey or the SmartKey with
KELESS-GO* removed from the starter
switch or with the SmartKey with
KEYLESS-GO* removed from the vehicle.
The hazard warning flasher switches on
automatically when an air bag deploys.
The hazard warning flasher switch is
located on the upper part of the center
console.
1Hazard warning flasher switchSwitching on hazard warning flasher
Press hazard warning flasher
switch1.
All turn signals are flashing.
Switching off hazard warning flasher
Press hazard warning flasher switch1
again.iWith the hazard warning flasher
activated and the combination switch
set for either left or right turn, only the
respective turn signals will operate
when the ignition is switched on.iIf the hazard warning flasher has been
activated automatically, press hazard
warning flasher switch1 once to
switch it off.
Page 135 of 514

134 Controls in detailLightingInterior lighting
The controls are located in the overhead
control panel.
1Left front reading lamp
2Rocker switch for automatic control
system
3Right front reading lampActivating automatic control
Press the rocker switch2 to the cen-
ter position.
Interior lamps are switched on in dark-
ness when you:
unlock the vehicle
open a door
remove the SmartKey from the
starter switch
The interior lamps are switched off after a
preset time, see “Setting interior lighting
delayed shut-off” (
page 159).Deactivating automatic control
Press the = symbol on rocker
switch2.
The interior lighting remains switched
off in darkness, even when you:
unlock the vehicle
open a door
remove the SmartKey from the
starter switch
iIf the door remains open, the interior
lamps switch off automatically after
approximately five minutes when the
SmartKey is removed or in starter
switch position 0.
An interior lamp switched on manually
does not go out automatically.
iThe trunk lamp switches on if the trunk
is opened.
If you leave the trunk open for an ex-
tended period of time, the trunk lamp
will switch off automatically after ap-
proximately ten minutes.
Page 136 of 514

135 Controls in detail
Lighting
Manual control
Switching all front interior lights on and
off
Press the W symbol on rocker
switch2.
The front interior lights come on.
Press rocker switch2 to center
position to activate the automatic
control.
Switching right front reading lamp on
and off
Press right button X.
The right reading lamp comes on.
Press right button X again.
The right reading lamp goes out.Switching left front reading lamp on and
off
Press left button X.
The left reading lamp comes on.
Press left button X again.
The left reading lamp goes out.
Door entry lamps
The appropriate door entry lamp switches
on if a door is opened in darkness and if
the interior lighting is switched to automat-
ic function.
The entry lamp switches off automatically
when the door is closed.Trunk lamp
The trunk lamp switches on if the trunk is
opened.
If you leave the trunk open for an extended
period of time, the trunk lamp will switch
off automatically after approximately ten
minutes.
iIf you turn the SmartKey in the starter
switch to position0 and switch off the
exterior headlamps, the door entry
lamps will remain lit for approximately
five minutes.