
Problems with the roof
Problem Possible causes/consequences and
0001 Solutions
The roof will not open or
close. The trunk partition is not closed and not properly engaged.
X
Close the trunk partition (Y page 88). The trunk lid is open.
X
Close the trunk lid (Y page 80). The on-board voltage is too low.
X
Leave the engine running. The roof has been opened and closed several times in
arow. The
roof drive has been automatically deactivated.
You can open and close the roof again after approximately ten
minutes.
X Switch off the ignition and turn it back on.
X Repeat the opening or closing procedure. The automatic roof mechanism is faulty.
X
Consult a qualified specialist workshop. 92
RoofOpening/closing

Automatic headlamp mode
G
WARNING
If the ligh tswitch is set to 0005and it is foggy,
snowing or there is poor visibility, the low-
beam headlamps will not come on
automatically. This could endange ryou and
others. In such situations turn the light switch
to 000A.
The automatic headlamp feature is only an
aid. The driver is responsible for the vehicle's
lighting at all times.
0005 is the favored light switch setting. The
light setting is automatically selected
according to the brightness of the ambient
light (exception: poor visibility due to weather
conditions such as fog, snow or spray):
R SmartKey in position 1in the ignition lock:
the parking lamps are switched on or off
automatically depending on the brightness
of the ambient light.
R With the engine running: if you have
activated the daytime running lamps
function via the on-board computer, the
daytime running lamps or the low-beam
headlamps and parking lamps are switched
on or off automatically depending on the
brightness of the ambient light.
X To switch on automatic headlamp
mode: turn the light switch to 0005.
Only for Canada:
The daytime running lamps improve the
visibility of your vehicle during the day. The
daytime running lamps function is required by
law in Canada. It cannot therefore be
deactivated.
When the engine is running and the vehicle is
stationary: if you move the selector lever from
a drive position to P, the daytime running
lamps/low-beam headlamps go out after
three minutes.
When the engine is running, the vehicle is
stationary and in high ambient light
brightness :ifyou turn the light switch to
0013, you turn on the daytime running
lamps and parking lamps.
If the engine is running and you turn the light
switch to 000A, the manual settings take
precedence over the daytime running lamps.
USA only:
The daytime running lamps improve the
visibility of your vehicle during the day. To do
this, the daytime running lamps function must
be switched on using the on-board computer
(Y page 204).
If the engine is running and you turn the light
switch to 0013or000A, the manual settings
take precedence over the daytime running
lamps.
i In the USA, the daytime running lamps are
deactivated upon delivery from the factory.
Low-beam headlamps G
WARNING
If the light switch is set to 0005and it is foggy,
snowing or there is poor visibility, the low-
beam headlamps will not come on
automatically. This could endanger you and
others. In such situations turn the light switch
to 000A.
The automatic headlamp feature is only an
aid. The driver is responsible for the vehicle's
lighting at all times.
Even if the light sensor does not detect that
is dark, the parking lamps and low-beam
headlamps switch on when the SmartKey is
inserted into the ignition lock and the light
switch is set to the 000Aposition. This is a
particularly useful function in the event of rain
and fog.
X To switch on the low-beam headlamps:
turn the SmartKey in the ignition lock to
position 2or start the engine.
X Turn the light switch to 000A.
The green 000Aindicator lamp in the
instrument cluster lights up. Exterior lighting
107Lights and windshiel dwipers Z

Front fog lamps
In conditions where visibility is poor due to
fog, snow or rain, the fog lamps improve
visibility as well as making it easie
rfor other
road users to see you. They can be operated
together with the parking lamps or together
with the parking lamps and low-beam
headlamps.
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 000Aor0005.
X Press the 000Bbutton.
The green 000Bindicator lamp in the
instrument cluster lights up.
X To switch off the front fog lamps: press
the 000B button.
The green 000Bindicator lamp in the
instrument cluster goes out.
Only vehicles with front fog lamps have the
fog lamps function.
Rear fog lamp
The rear fog lamp improves visibility of your
vehicle for the traffic behind in the event of
heavy fog. Please take note of the country-
specific regulations for the use of rear fog
lamps.
X To switch on the rear fog lamp: turn the
SmartKey in the ignition lock to position 2
or start the engine.
X Turn the light switch to 000Aor0005.
X Press the 000Dbutton.
The yellow 000Dindicator lamp in the
instrument cluster lights up.
X To switch off the rear fog lamp: press the
000D button.
The yellow 000Dindicator lamp in the
instrument cluster goes out.
Parking lamps
! If the battery has been excessively
discharged, the parking lamps or standing
lamps are automatically switched off to
enable the next engine start.A lways parkyour vehicle safely and sufficiently lit
according to legal standards. Avoid the
continuous use of the
0013parking lamps
for several hours. If possible, switch on the
0010 right or the 000Eleft standing lamp.
X To switch on: turn light switch to 0013.
Standing lamps
Switching on the standin glamps ensures the
corresponding side of the vehicle is
illuminated.
X To switch on the standing lamps: the
SmartKey is not in the ignition lock or it is
in position 0.
X Turn the light switch to 000E(left-hand side
of the vehicle) or 0010(right-hand side of
the vehicle). Combination switch
Turn signals 0003
High-beam headlamps
0004 Turn signal, right
0024 High-beam flasher
0023 Turn signal, left
X To indicate briefly: press the combination
switch briefly to the pressure poin tinthe
direction of arrow 0004or0023.
The corresponding turn signal flashes three
times.
X To indicate: press the combination switch
beyond the pressure point in the direction
of arrow 0004or0023. 108
Exterior lightingLights and windshield wipers

High-beam headlamps
X
To switch on the high-beam headlamps:
turn the SmartKey in the ignition lock to
position 2or start the engine.
X Turn the light switch to 000Aor0005.
X Press the combination switch beyond the
pressure point in the direction of
arrow 0003.
In the 0005position, the high-beam
headlamps are only switched on when it is
dark and the engine is running.
The 0009 indicator lamp in the instrument
cluster lights up when the high-beam
headlamps are switched on.
X To switch off the high-beam
headlamps: move the combination switch
back to its normal position.
The 0009 indicator lamp in the instrument
cluster goes out.
High-beam flasher X
To switch on: turn the SmartKey in the
ignitio nlock to position 1or 2or start the
engine.
X Pull the combination switch in the direction
of arrow 0024. Hazard warning lamps
X
To switch on the hazard warning lamps:
press button 0003.
All turn signals flash. If you now switch on
a turn signal using the combination switch, only the turn signal lamp on the
corresponding side of the vehicle will flash.
X To switch off the hazard warning
lamps: press button 0003.
The hazard warning lamps automatically
switch on if:
R an air bag is deployed.
R the vehicle is slowed down rapidly from a
speed of over 45 mph (70 km/h) and
comes to a halt.
If the vehicle returns to a speed of over
6m ph (10 km/h) after a full application of the
brakes, the hazard warning lamps are
deactivated automatically.
i The hazard warning lamps still operate if
the ignition is switched off. Headlamp cleaning system
The headlamps are cleaned automatically if
the "Wipe with washer fluid" function is
operated five times (Y page 115) while the
lights are on and the engine is running. When
you switch off the ignition, the automatic
headlamp cleaning system is reset and
counting is resumed from 0. Cornering light function
The cornering light function improves the
illumination of the road over a wide angle in
the direction you are turning, enabling better
visibility in tight bends, for example. The
cornering light function can only be activated Exterior lighting
109Lights and windshield wipers Z

0024
0012 Switches the right-hand reading
lamp on/off
0023 0003 Switches the interio rlighting on/off Interior lighting control
General notes In order to prevent the vehicle's battery from
discharging, the interior lighting functions are
automatically deactivated after some time
unless the SmartKey is in position 2in the
ignition lock.
The color and brightness of the ambient
lighting may be set using the on-board
computer (Y page 204).
Automatic interior lighting control X
To activate/deactivate: press the0019
button.
When the automatic interior lighting
control is activated, the button is flush with
the overhead control panel.
The interior lighting automatically switches
on if you:
R unloc kthe vehicle
R open a door
R remove the SmartKey from the ignition lock
The interior light is activated for a short while
when the SmartKey is removed from the
ignition lock. You can activate this delayed
switch-off using the on-board computer
(Y page 205).
Manual interior lighting control X
To switch the interior lighting on/off:
press the 0003button.
X To switch the reading lamps on/off:
press the 0012button. Crash-responsive emergency lighting
The interior lighting is activated automatically
if the vehicle is involved in an accident.
X To switch off the crash-responsive
emergency lighting: press the hazard
warning lamp button.
or
X Lock and then unlock the vehicle using the
SmartKey. Replacing bulbs
Important safety notes
Xenon bulbs G
DANGER
Xenon bulbs carry a high voltage. You could
get an electric shock and be seriously or even
fatally injured if you touch the electric
contacts on Xenon bulbs. Therefore, never
remove the cover from Xenon bulbs.
Do not change the Xenon bulbs yourself, but
have them replaced at a qualified workshop.
If your vehicle is equipped with Xenon bulbs,
you can recognize this by the following: the
cone of light from the Xenon bulbs moves
from the top to the bottom and back again
when you start the engine. For this to be
observed, the lights must be switched on
before starting the engine.
Bulbs and lamps are an important aspect of
vehicle safety. You must therefore make sure
that these function correctly at all times.
Have the headlamp setting checked regularly.
Other bulbs G
WARNING
Bulbs and lamps can become very hot. For
this reason, allow them to cool down before
changing them. Otherwise, you could burn
yourself when you touch them. 112
Replacing bulbsLights and windshield wipers

Replacing the wiper blades
Removing the wiper blades
X
Turn the SmartKey to position 1or 2in the
ignition lock.
X Set the windshield wipers to
position 0015.
X Whe nthe wiper arms have reached a
vertical position, turn the SmartKey to
position 0and remove it from the ignition
lock.
X Fold the windshield wiper arms away from
the windshield. X
Press both release clips 0004.
X Fold wiper blade 0003in the direction of
arrow 0024away from wiper arm 0023.
X Remove wiper blade 0003in the direction of
arrow 0021.
Installing the wiper blades X
Position new wiper blade 0003with
recess 0022on lug 0021.
X Fold wiper blade 0003in the direction of
arrow 0024onto the wiper arm, until retaining
clips 0004engage in bracket 0023.
X Make sure that wiper blade 0003is seated
correctly.
X Fold the wiper arm back onto the
windshield. Problems with the windshield wipers
The windshield wipers are obstructed X
For safety reasons, you should remove the
SmartKey from the ignition lock.
or
X Switch off the engine using the Start/Stop
button and open the driver's door.
X Remove the cause of the obstruction.
X Switch the windshield wipers back on.
The windshield wipers are inoperative The windshield wiper drive is malfunctioning.
X
Select another wiper speed on the
combination switch.
X Have the windshield wipers checked at a
qualified specialist workshop.
The spray nozzles are misaligned The windshield washer fluid from the spray
nozzles no longer hits the center of the
windshield. The spray nozzles are misaligned.
X
Have the spray nozzles adjusted at a
qualified specialist workshop. Windshield wipers
117Lights and windshield wipers Z

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Read the information on qualified
specialist workshops: (Y page 23).Overview of climate control systems
Important safety notes
G
WARNING
Observe the settings recommended on the
following pages. The windows could
otherwise fog up. This could preven tyou from
observing the traffic conditions, thereby
causing an accident. G
WARNING
Severe conditions (e.g. strong air pollution)
may require replacement of the filter before
its scheduled replacement interval. Aclogged
filter will reduce the air volume to the interior
and the windows could fog up, impairing
visibility and endangering you and others.
Have a clogged filter replaced as soon as
possible at a qualified specialist workshop.
Climate control regulates the temperature
and the humidity in the vehicle interior and
filters undesirable substances out of the air.
Climate control is only operational when the
engine is running. The system only works
optimally when the side windows and the roof
are closed.
The residual heat function can only be
activated or deactivated with the ignition
switched off (Y page 129). i
Ventilate the vehicle for a brief period
during warm weather .This will speed up the
cooling process and the desired vehicle
interior temperature will be reached more
quickly.
i The integrated filter can filter out most
particles of dust, and completely filters out
pollen. Aclogged filter reduces the amount
of air supplied to the vehicle interior .For
this reason, you should always observe the
interval for replacing the filter, which is
specified in the Maintenance Booklet.
Since the replacement interval depends on
environmental conditions, e.g. heavy air
pollution, the interval may be shorter than
stated in the Maintenance Booklet. 120
Overview of climate control systemsClimate control

activated or deactivated with the ignition
switched off. Operating the climate control
systems
Activating/deactivating climate
control
General notes G
WARNING
When the climate control system is switched
off, the outside air supply and circulation are
also switched off .Only choose this setting for
a short time when the retractable hardtop
(vario-roof) is closed .Otherwise, the windows
could fog up, impairing visibility and
endangering you and others.
i Switch on climate control primarily using
the 0005 button ( Ypage 126).
Air-conditioning system X
To activate: turn airflow control
0015(Y page 121) clockwise to the desired
positio n(except position 0).
X To deactivate: turn airflow control
0015(Y page 121) counter-clockwise to
position 0. 3-zone automatic climate control X
Turn the SmartKey to position 2in the
ignition lock.
X To switch on: press the0005button.
The indicator lamp in the 0005button lights
up. Airflow and air distribution are set to
automatic mode.
or
X Press the 000Cbutton.
The indicator lamp in the 000Cbutton goes
out. The previously selected settings are
restored.
X To switch off: press the000Cbutton.
The indicator lamp in the 000Cbutton lights
up. Activating/deactivating cooling with
air dehumidification
General notes G
WARNING
If you switch off the cooling function, the
vehicle will not be cooled when weather
conditions are warm. The windows can fog up
more quickly. This may preven tyou from
observing the traffic conditions, thereby
causing an accident.
The cooling with air dehumidification function
is only available when the engine is running.
The air inside the vehicle is cooled and
dehumidified according to the temperature
selected.
Condensation may drip from the underside of
the vehicle when it is in cooling mode. This is
normal and not a sign that there is a
malfunction. Operating the climate control systems
125Climate control Z