
Problems with the windshield wipers
Problem Possible causes/consequences and
0050
0050Solutions The windshield wiper
jams. Leaves or snow, for example, may be obstructing the windshield
wiper movement. The wiper motor has switched off.
X
Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X For safety reasons, you should remove the SmartKey from the
ignition lock.
X Remove the cause of the obstruction.
X Switch on the windshield wiper again. The windshield wiper
does not move at all. There is a malfunction in the windshield wiper drive.
X
Select another wiper speed on the combination switch.
X Have the windshield wiper checked at a qualified specialist
workshop. 110
Windshield wipersLights and windshield wipers 

Control panel for rear-compartment air-conditioning system
0043
Sets the airflow (Y page 118)
0097 Increases the airflow
0095 Reduces the airflow
0044 Sets the temperature (Y page 117)
0087 Blower setting bar display
0085 0074 Switches the rear-compartment air conditioning on/off (Y page 116)Information on rear-compartment air
conditioning
For optimum climate control, set the temper-
ature control to the middle level. Only change
the temperature in small increments. Operating the climate control system
Switching the climate control on/off
Important information When the climate control is switched off, air
intake and air circulation also stop. Only use
this setting for a brief period. Otherwise, the
windows could fog up. Activating/deactivating climate
control via the control panel X
Turn the key to position 2in the ignition
lock.
Vehicle with heating
X To switch on: set airflow control 0044down
to at least level 1(Y page 114).
X To switch off: set airflow control 0044up to
the 0position (Y page 114).
Vehicle with air conditioning
X To switch on: press the0097button.
The blower speeds are shown in bars next
to the button.
X To switch off: press the0095button and,
after reaching the lowest blower speed,
press it again. 116
Operating the climate control systemClimate control 

Activating/deactivating rear-compart-
ment climate control via the control
panel X
Turn the key to position 2in the ignition
lock.
Vehicle with rear-compartment heating/
rear-compartment air conditioning
X To switch on/off: press the0074switch.
If the indicator lamp in the button lights up,
the rear-compartment heating/rear-com-
partment air conditioning is switched on. Switching the cooling with air dehu-
midification function on/off
Important information If you switch off the "Cooling with air dehu-
midification" function, the air inside the vehi-
cle will not be cooled (in warm weather) or
dehumidified. The windows could fog up more
quickly.
The cooling with air dehumidification function
is only available when the engine is running.
The air inside the vehicle is cooled and dehu-
midified according to the temperature
selected.
Condensation may appear on the underside
of the vehicle when in cooling mode. This is
normal and not a sign that there is a malfunc-
tion.
Switching on/off Vehicle with air conditioning
X
Press the 005Abutton.
If the indicator lamp in the button lights up,
cooling with air dehumidification is
switched on. Setting the temperature
Increasing/reducing temperature in
the front compartment via the control
panel Only change the temperature in small incre-
ments. Start at the center position, or at
22 †.
X
Switch on climate control (Y page 116).
X Turn temperature control 0043clockwise to
increase or counterclockwise to reduce the
temperature (Y page 114).
Increasing/reducing temperature in
the rear compartment via the control
panel Only change the temperature in small incre-
ments.
X
Switch on climate control (Y page 116).
X Turn rear-compartment temperature
control 0087(Ypage 115) or rear-compart-
ment air-conditioning system 0044
(Y page 116) clockwise to increase or
counterclockwise to reduce the tempera-
ture.
i Vehicles with additional air conditioning
and heating in the rear compartment: if you
set the temperature control to the center
position, only one of the two climate
control systems works in the rear compart-
ment and in air-recirculation mode
(Y page 120). Setting the air distribution
Air distribution settings The air distribution symbols have the follow-
ing meanings:
0078
Directs air through the center and
side air vents
007E
0085 Directs air to the windshield and the
air vents Operating the climate control system
117Climate control 

Rear window defroster
Rear window defroster switch
The rear window defroster consumes a lot of
power. You should therefore switch it off as
soon as the window is clear. The rear window
defroster otherwise switches off automati-
cally after 12 minutes.
X Start the engine.
X To switch on/off: press the0071switch.
The indicator lamp in the 0071button
comes on when the rear window defroster
is switched on.
If the indicator lamp in the 0071rear window
defroster button flashes, the on-board volt-
age is too low. The rear window defroster has
switched off prematurely or cannot be acti-
vated.
X Switch off any consumers that are not
required, e.g. reading lamps or interior
lighting.
If enough on-board voltage is available again
within 30 seconds, the rear window defroster
automatically switches on again. It otherwise
remains switched off. Switching air-recirculation mode on/
off
Important safety notes When you switch on air-recirculation mode,
the windows could fog up more quickly, in
particular at low outside temperatures. Only switch on air-recirculation mode for a short
time.
You can deactivate the intake of fresh air if
unpleasant odors enter the vehicle from out-
side. The air inside the vehicle will only be
circulated.
Heating/air-conditioning system
Air-recirculation mode switches off automat-
ically after about 10to 30 minutes, depending
on the outside temperature.
X Switch on climate control (Y page 116).
X To switch on/off: press the008Aswitch.
If the indicator lamp in the 008Abutton
lights up, air-recirculation mode is acti-
vated.
Rear-compartment heating/rear-com-
partment air conditioning On vehicles with a rear-compartment heating
and air-conditioning system, you can acti-
vate/deactivate air-recirculation mode for
the rear-compartment climate control.
X
Switch on climate control (Y page 116).
X To activate: set the temperature control of
rear-compartment heating
0087(Y page 115) or rear-compartment air
conditioning system 0044(Ypage 116) to the
center position.
Only one of the two climate control sys-
tems in the rear compartment is activated
and is in air-recirculation mode.
X To deactivate: turn the temperature
control of rear-compartment heating
0087(Y page 115) or rear-compartment air-
conditioning system 0044(Ypage 116) clock-
wise or counterclockwise. Only change the
temperature in small increments. 120
Operating the climate control systemClimate control 

Adjusting the air vents
Important safety notes
G
WARNING
Very hot or very cold air can flow from the air
vents. This could result in burns or frostbite in
the immediate vicinity of the air vents. There
is a risk of injury.
Make sure that all vehicle occupants always
maintain a sufficient distance to the air out-
lets. If necessary, redirect the airflow to
another area of the vehicle interior.
The center and side air vents are adjustable.
On vehicles with a rear-compartment air-con-
ditioning system, you can also adjust the air
vents in the roof duct.
i For virtually draft-free ventilation, adjust
the sliders of the center air vents to the
center position.
In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes:
R keep the air inlet grille on the hood free of
blockages, such as ice, snow or leaves.
R never cover the vents or the ventilation
grilles in the vehicle interior. Setting the center air vents
0043
Center air vent, left
0044 Center air vent, right
0087 Thumbwheel for center air vent, right
0085 Thumbwheel for center air vent, left X
To open: turn thumbwheel 0087to the right
or thumbwheel 0085to the left.
X To close: turn thumbwheel 0087to the left or
thumbwheel 0085to the right. Setting the side air vents
Side air vent (example: right-hand side of the vehi-
cle)
X
To open: turn thumbwheel 0087of side air
vents 0043upward.
X To close: turn thumbwheel 0087of side air
vents 0043downward.
i If the 0060 symbol can be seen on thumb-
wheel 0087, defroster vent 0044is open. Adjusting air vents for the passenger
compartment
Air vents (example: right-hand side of the vehicle)
You can use the air vents to ventilate the
vehicle interior on the left and right, in the rear
and the headroom. Adjusting the air vents
121Climate control Z 

X
To open: for the right-hand side of the vehi-
cle, turn thumbwheel 0044or for the left-hand
side of the vehicle, thumbwheel 0043of the
air vents clockwise.
X To close: for the right-hand side of the
vehicle, turn thumbwheel 0044or for the left-
hand side of the vehicle, thumbwheel 0043of
the air vents counter-clockwise. Adjusting the air vents in the roof duct
! Always leave at least one air vent open.
If the rear-compartment air conditioning is
switched on and all the air vents are closed,
the air-conditioning system may be dam-
aged. On vehicles with rear-compartment air con-
ditioning, adjustable air vents are integrated
into the roof duct.
X To adjust the airflow: open or close the
air flap in air vents 0043as needed.
X To adjust the air distribution: turn air
vent 0043to the desired position. Operating the auxiliary heating sys-
tem Important safety notes
G
DANGER
If the exhaust pipe is blocked or adequate
ventilation is not possible, poisonous gases
such as carbon monoxide (CO) may enter the vehicle. This is the case, for example in
enclosed spaces or if the vehicle gets stuck
in snow. There is a risk of fatal injury.
Switch the auxiliary heating off in enclosed
spaces without extraction systems, e.g. in
garages. If the vehicle is stuck in snow and
you have to leave the auxiliary heating run-
ning, keep the exhaust pipe and the area
around the vehicle free of snow. To ensure an
adequate supply of fresh air, open a window
on the side of the vehicle that is not facing
into the wind. G
WARNING
When the auxiliary heating is switched on,
parts of the vehicle can become very hot, e.g.
the exhaust system. Flammable material such
as leaves, grass or twigs may ignite if they
come into contact with hot parts of the
exhaust system. There is a risk of fire.
When the auxiliary heating is switched on,
make sure that no flammable material can
come into contact with hot vehicle compo-
nents.
! Turn on the auxiliary heating at least once
a month for approximately 10 minutes. The
auxiliary heating could otherwise be dam-
aged.
! Make sure that the flow of hot air is not
blocked. The auxiliary heating will other-
wise overheat and switch off.
Your vehicle may be equipped with either an
auxiliary hot-water heater or an auxiliary
warm-air heater. Adjustment and operation of
the:
R hot-water auxiliary heater is done via the
on-board computer and with the auxiliary
heating button in the control panel
(Y page 124) or with the remote control
(Y page 125).
R auxiliary warm-air heater is done via the
timer above the overhead control panel
(Y page 127).
The auxiliary heating works independently of
the engine and supplements the climate 122
Operating the auxiliary heating systemClimate control 

control system in the vehicle. The auxiliary
heating heats the air in the vehicle interior to
the temperature set.
If your vehicle is equipped with a hot-water
auxiliary heater, the auxiliary heating also
keeps the coolant warm. This way, the load
on the engine is minimized and fuel is saved.
The heater booster function (Y page 130) of
the auxiliary heating supports the climate
control system when the engine is running
and the outside temperature is low.
You can use the auxiliary heating at an out-
side temperature of up to 39 ‡ (4 †). At an
outside temperature above 39 ‡ (4 †) the
auxiliary heating system and the heater boos-
ter function switch off automatically. Heating time
The heating time operating the auxiliary heat-
ing when the vehicle is stationary without the
engine running depends on the outside tem-
perature. Outside tempera-
ture Heating time
Above 23 ‡ (
00F85 †) Approx. 20 minutes
23 ‡ (
00F85 †) to 5 ‡
(00F815 †) Approx. 40 minutes
Below 5 ‡ (00F815 †) Approx. 50 minutes
You can then switch on the auxiliary heating
again.
If you do not start the engine for a while, the
total duration of heating is limited to a maxi-
mum of 120 minutes to protect the starter
battery. Switching on the auxiliary heating is
then automatically disabled. You can, for
example, switch on the auxiliary heating with-
out the engine running if the outside temper-
ature is
00F85 ‡ (00F820 †) a maximum of two
times. If you try it again, the indicator lamps
in the 0084button (Y page 124) flash alter-
nately for approximately 2 minutes to signal switch-on interlock. The auxiliary heating can-
not be switched on without starting the
engine.
When the charge status of the starter battery
is sufficient again, the switch-on interlock will
be deactivated. To charge the starter battery,
let the engine run. The engine runtime
required to reach the necessary charge sta-
tus depends on the outside temperature.
Outside tempera-
ture Engine runtime
Above 32 ‡ (0 †) Approx. 10 minutes
32 ‡ (0 †) to 14 ‡
(00F810 †) Approx. 15 minutes
Below 14 ‡ (
00F810 †) Approx. 20 minutes
Before switching on
X Check the fuel level and top up if necessary.
The auxiliary heating is operated directly
using the vehicle's fuel. The tank must be
at least a quarter full to ensure that the
auxiliary heating functions.
X Switch on climate control (Y page 116).
X Set the temperature control to the desired
temperature (Y page 117).
X Set the air distribution as required
(Y page 117).
X Open the center (Y page 121) and side air
vents ( Ypage 121) and set them to the
middle position.
i The auxiliary heating automatically
switches to heater booster mode after the
engine is started. Operating the auxiliary heating system
123Climate control Z 

Operating with the button (control
panel)
i
Switch the heater booster function on or
off with the 006Abutton (Y page 130).
X To activate the auxiliary heating sys-
tem: press the upper section of the 0084
switch for longer than two seconds.
The red indicator lamp in the button lights
up. The auxiliary heating heats or ventilates
the interior to the temperature that you
have set. The blower switches to the first
level.
X To switch off auxiliary heating: press the
upper section of the 0084button.
Or
X Turn the key in the ignition lock to posi-
tion 0.
The red indicator lamp in the button goes
out. The auxiliary heating operates for
another two minutes and then switches off
automatically. Selecting a switch-on time
Important information You can use the on-board computer to define
up to three switch-on times, one of which can
be selected.
The yellow indicator lamp in the 0084button
goes out after 30 minutes, if you:
R have selected the switch-on time and
R turn the key to position 0in the ignition
lock. On-board computer without steering
wheel buttons X
Turn the key to position 2in the ignition
lock.
X Press the 0084button.
The 0084 symbol flashes in the display.
Or
X Press the 0079menu button on the instru-
ment cluster repeatedly until the 0084
symbol flashes in the display.
X Use the 0074or0075 buttons on the instrument
cluster to select the switch-on time 1
1 to 3 3.
The switch-on time selected is displayed.
X Wait 10 seconds for the standard display to
appear.
The switch-on time is selected. The yellow
indicator lamp in the 0084button lights up.
If you do not preselect a switch-on time,
and --:-- --:-- is shown in the display, this
means that the automatic switch-on mode
is switched off. The yellow indicator lamp
in the 0084button goes out.
On-board computer with steering wheel
buttons X
Turn the key to position 2in the ignition
lock.
X Press the 0084button.
The Aux. heat Aux. heat submenu is shown in the
display.
If no switch-on time has been selected, the
selected switch-on time is highlighted or
Timer off
Timer off is highlighted.
i You can also access the Aux. Aux.heat.
heat. sub-
menu via the Settings
Settings(Ypage 190)
menu. 124
Operating the auxiliary heating systemClimate control