
Climate control
Overview of climate control systems
The vehicle is equipped with one of the following climate control systems: Heating
The heating system is a heating and
ventilation system,
without
a cooling system
(Y page 98). Air-conditioning system
The air-conditioning
system is a combination
of a heating
and ventilation system, together
with a cooling system ( Y page 99). Rear-compartment heating
The separately activated rear-compartment
heating allows a separate temperature and
airflow setting for the rear compartment
(Y
page 99).
Rear-compartment air-conditioning system
The separately activated rear-compartment
air conditioning allows a separate
temperature and airflow setting for the rear
compartment (
Y
page 100).On vehicles without rear-compartment air conditioning, the control unit is equipped with a
paper holder (
Y page 131). Climate control
97
Controls Z

General notes
G
Warning
A driver's attention to the road and traffic
conditions must always be his/her primary
focus when driving.
For your safety and the safety of others, we
recommend that the
driver should only select
functions through the control panel of the
climate control system when traffic and road
conditions permit it to be done safely.
Bear in mind that at a speed of just 30 mph
(approximately 50 km/h), your vehicle is
covering a distance of 44 feet (approximately
14 m) every second.
The air-conditioning system regulates the
temperature and humidity of the vehicle
interior and filters undesired particles out of
the air.
The heating/air-conditioning system can only
be operated when the engine is running. The
system only functions optimally when the
side windows are closed.
The installed filter removes most dust
particles, pollen and unpleasant odors drawn
in from the outside air. A clogged filter
reduces the airflow into the vehicle interior.
The interval for replacing the filter depends
on environmental influences. The interval
may be shorter than that indicated in the
Maintenance Booklet.
i Ventilate the vehicle for a brief period
during warm weather or briefly switch to
air-recirculation mode to quickly cool down
the vehicle if you have air conditioning/
automatic climate control. In this way, you
will accelerate the cooling process and
achieve the desired temperature faster. G
Warning
Observe the settings recommended on the
following pages. The windows could
otherwise fog up.
This may obstruct your view
of the traffic situation and, as a result, you
may cause an accident. Electrical heater booster system The vehicle can be equipped with an
electrically-powered heater booster system.
The heater booster system ensures that the
vehicle interior is heated up very quickly
during the engine's warm-up phase.
i
The heater booster system switches on
automatically as required. Overview of the functions of the
climate control system
Heating Control panel, left-hand-drive vehicles
Operation
0046
Sets the temperature (
Y page 100) 0087 Defrosts the windshield
0047
0099 Sets the airflow (
Y
page 102)
0087 Defrosts the windshield
008A
008C Switches air-recirculation mode
on/off ( Y page 104) 0088
Sets the air distribution
(Y
page 102)
00800087 Defrosts the windshield98
Climate control
Controls

Recommendations for optimum climate
control:
R
set the temperature control to the middle
level. Only change
the temperature in small
increments.
R only use the defrosting function until the
windshield is clear again ( Y page 103).
R only use air-recirculation mode briefly, e.g.
in a tunnel. The windows could otherwise
fog up, because the flow of fresh air is cut
off and the air inside the vehicle is
circulated.
Rear-compartment heating Operation
0046
0076 Switches air-recirculation mode
on/off ( Y page 100) 0047
0099 Sets the airflow (
Y page 102)008A
Sets the temperature (
Y page 100)For optimum climate control, set the
temperature control to
the middle level. Only
change the temperature in small increments.
Air-conditioning system Operation
0046
Sets the temperature (
Y page 100) 0087 Defrosts the windshield
0047
Sets the airflow (
Y page 102)
0099 Increases the airflow
0097 Decreases the airflow 008A
008C Switches air-recirculation mode
on/off (
Y page 104) 0088
0085 Switches the reheat function
(window air dehumidification) on/off
(Y page 103)
0086
Sets the air distribution
(Y page 102)
00800087 Defrosts the windshield
0087
005C Switches cooling with air
dehumidification on/off
(Y page 100)
006E
Blower setting bar display
0087 Defrosts the windshield
Recommendations for optimum climate
control:
R
Set the temperature
to 72 ‡ (22 †) . Only
change the temperature in small
increments.
R Switch on cooling with air
dehumidification. The indicator lamp in the
switch comes on.
R Only use the defrosting function until the
windshield is clear again ( Y page 103).
R Only use the reheat function until the
fogged up windows are clear again.
R Only use air-recirculation mode briefly, e.g.
in a tunnel. The windows could otherwise
fog up, because the flow of fresh air is cut
off and the air inside the vehicle is
circulated. Climate control
99
Controls Z

Rear-compartment air-conditioning
system
Operation
0046
Sets the airflow (
Y page 102)
0099 Increases the airflow
0097 Decreases the airflow 0047
Sets the temperature (
Y page 100)008A
0099 Blower setting bar display
0088
0076 Activates/deactivates the rear-
compartment air-conditioning
system ( Y
page 100)For optimum climate control, set the
temperature control to
the middle level. Only
change the temperature in small increments. Switching the climate control on/off
When the climate control is switched off, air
intake and air circulation also stop. Only
select this setting briefly, as otherwise, the
windows may fog up.
Air-conditioning system X
To activate: press the 0099 button and
adjust the blower
setting to at least the first
level.
The blower speeds are shown in bars next
to the button.
X To switch off: press the 0097
button and
after reaching the lowest blower setting,
press it again. Rear-compartment heating/rear-
compartment air conditioning X
Press the 0076 button.
If the indicator
lamp in the button lights up,
the rear-compartment heating/rear-
compartment air conditioning is switched
on. Switching cooling with air
dehumidification on/off
If you want to cool the air inside the vehicle
to the set temperature, you must switch on
cooling with air dehumidification in vehicles
with an air-conditioning
system. The air inside
the vehicle is then cooled and dehumidified.
This prevents the windows from misting up.
Condensation may appear on the underside
of the vehicle when in cooling mode. 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 prevent you from
observing the traffic conditions, thereby
causing an accident.
X Press the 005C button.
If the indicator
lamp in the button lights up,
cooling with air dehumidification is
switched on. Setting the temperature
Heating/air-conditioning system X
Turn temperature control 0046 clockwise to
increase the temperature or
counterclockwise to reduce the
temperature ( Y page 98), (Y page 99).
Begin in the center position or at 22 †.
Only change the temperature in small
increments. 100
Climate control
Controls

Rear-compartment heating/rear-
compartment air conditioning
X
Make sure that the rear-compartment
climate control (rear-compartment
heating/air conditioning) is switched on
(Y page 100).
X Turn rear-compartment heating
temperature control 008A(
Y page 99) or rear-
compartment air conditioning temperature
control 0047(Y page 100) clockwise to
increase or counterclockwise to reduce the
temperature. Only change the temperature
in small increments.
i Your vehicle may be equipped with rear-
compartment heating and rear-
compartment air conditioning.
If you set the temperature control to the
center position,
only
one of the two climate
control systems is activated in the rear
compartment and set to air-recirculation
mode ( Y page 104). Setting the air vents
General notes G
Warning
Air flowing out of the air vents may be very hot
or very cold. Therefore, there is a risk of
frostbite or burns to exposed skin in the
immediate proximity of these air vents. Keep
exposed parts of the body away from these
air vents. If necessary, direct the airflow to a
different area of the vehicle interior.
You can set
the center and side air vents. The
entire vehicle interior is ventilated via the air
vents. Observe the following instructions so air can
flow freely through the air vents:
R
keep the air
inlet on the hood free from ice
and snow.
R never cover the vents or air inlet and outlet
grilles in the vehicle interior.
R for virtually draft-free ventilation, move the
sliders on the center air vents to the central
position.
Center air vents 0046
Center air vent, left
0047 Center air vent, right
008A Thumbwheel for center air vent, right
0088 Thumbwheel for center air vent, left
X Turn thumbwheel 008A or 0088 to the right to
open and to the left to close to close the
center air vent.
Side air vents Side air vent (example, right-hand side of the
vehicle) Climate control
101
Controls Z

X
Turn thumbwheel 008A up to open and down
to close side air vent 0046.
If the 0062 symbol can be seen on
thumbwheel 008A, defroster vent 0047 is open.
Air vents You can use the air vents to ventilate the
vehicle interior
on
the left and right, in the rear
and the headroom. Air vents (example, right-hand side of the vehicle)
0046
Air vent thumbwheel, left-hand side of the
vehicle
0047 Air vent thumbwheel, right-hand side of
the vehicle
X Turn thumbwheel 0046 or 0047 to the right to
open and to the left to close the air vents.
Air vent in the roof duct On vehicles with rear-compartment air
conditioning, adjustable air vents are
integrated into the roof duct. X
Set the airflow by opening/closing the air
flaps.
X Set the air distribution by turning air
vents 0046.
! 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
damaged. Setting the air distribution
The air distribution symbols have the
following meanings:
007A Directs air through the center
and side air vents
00800087 Directs air to the windshield and
the air vents
007E Directs air to the windshield, the
air vents and into the footwell
007F Directs air to the air vents and
into the footwell
Heating/air-conditioning system X
Set air-distribution control for the
heating 0088(Y page 98) or air conditioning
0086(Y page 99) to the corresponding
symbol. Setting the airflow
Heating/rear-compartment heating X
On vehicles with rear-compartment
heating, make sure that the rear-
compartment climate control is activated
(Y page 100).
X Set airflow control 0047 to the desired level
(Y page 98), ( Y page 99).102
Climate control
Controls

Air-conditioning system/rear-
compartment air conditioning
X
On vehicles with rear-compartment air
conditioning, make sure that the rear-
compartment climate control is activated
(Y page 100).
X Press the 0097 button to reduce or the
0099 button to increase the airflow.
The blower speeds are shown in bars next
to the buttons. Defrosting the windows
G
Warning
Clear all windows of ice or snow before setting
off. Otherwise, impaired visibility could
endanger you and others.
Only use the following settings until the
windows are clear again.
X Vehicles with window heating:
switch on
the front and/or rear window defroster
(
Y page 95).
Heating X
Set temperature control 0046 and airflow
control 0047 to 0087 (Y page 98).
X Set air-distribution control 0088 to
0080 0087 (Y page 98).
X Close the center air vents and the air
outlets for the headroom and the rear
compartment (
Y
page 101).
X Direct the side air vents towards the side
windows and open the demister vents for
the side windows ( Y page 101).
Air-conditioning system X
Set temperature control 0046 to
0087 (Y page 99).
X Press the 0099 button until the maximum
blower output is reached.
All bars in the display next to the button
light up. X
Set air-distribution control 0086 to
0080 0087 (Y page 99).
X Close the center air vents and the air
outlets for the headroom and the rear
compartment (Y
page 101).
X Direct the side air vents towards the side
windows and open the demister vents for
the side windows ( Y page 101). Defrosting windows
Windows fogged up on the inside Only use the following settings until the
windows are clear again.
X
Vehicles with window heating: switch on
the front and/or rear window defroster
(
Y page 95).
X Switch off air-recirculation mode
(Y page 104).
Heating
X Set temperature control 0046 to a higher
temperature ( Y page 98).
X Set airflow control 0047 to a higher blower
setting. It should
be set at least to level two
(Y page 98).
X Set air-distribution control 0088 to
0080 0087 (Y page 98).
If the windows still fog up, set the control as
described for defrosting (Y page 103).
Air-conditioning system
X Activate cooling with air dehumidification
(Y page 100).
X Press the 0068 button.
The reheat function is switched on. The
indicator lamp in the switch lights up.
To switch off
the reheat function, press the
0068 button again. The indicator lamp in
the button goes out. Climate control
103
Controls Z

Windows fogged up on the outside
Only use the following settings until the
windshield is clear again.
X
Switch on the windshield wipers
(Y page 94).
X Adjust air distribution to the footwell
(Y page 102).
X Close the air vents ( Y page 101).Switching air-recirculation mode on/
off
You can deactivate the intake of fresh air if
unpleasant odors enter the vehicle from
outside. The air
inside the vehicle will only be
circulated. G
Warning
At low outside temperatures, only switch over
to air-recirculation mode for brief periods.
Otherwise, the windows could fog up, thus
impairing visibility and endangering yourself
and others. This may prevent you from
observing the traffic conditions and thereby
cause an accident.
Heating/air-conditioning system X
Press the 008C button.
If the indicator
lamp in the button lights up,
air-recirculation mode is activated.
Air-recirculation mode switches off
automatically after about 10 to 30 minutes,
depending on the outside temperature.
Rear-compartment heating/rear-
compartment air conditioning If your vehicle is equipped with rear-
compartment heating
and
rear-compartment
air conditioning, you can activate/deactivate
the air-recirculation mode of the rear-
compartment climate control.
X To activate: set temperature
control of the
rear-compartment heating 008A(Y page 99)
or or temperature control of the rear- compartment air conditioning
0047
(Y page 100) to the center position.
Only one of the two climate control
systems in the rear compartment is
activated and is in air-recirculation mode.
X To deactivate: turn temperature
control of
the rear-compartment heating
008A(Y page 99) or temperature control of
the rear-compartment air conditioning 0047
(Y page 100) clockwise or
counterclockwise. Only change the
temperature in small increments. Auxiliary heating
Important safety notes G
Warning
Exhaust fumes are produced while the
auxiliary heating system
is in operation. If you
breathe in these exhaust fumes, you could be
poisoned. Therefore, always switch off the
auxiliary heating in enclosed spaces without
an extraction system, e.g. a garage. G
Warning
Parts of the vehicle can become very hot
during operation of the auxiliary heating.
Make sure that the exhaust system does not
under any circumstances come into contact
with highly flammable material such as dry
grass or fuels. Otherwise, the highly
flammable material could ignite and set the
vehicle alight.
Auxiliary heating operation is prohibited at
gas stations or when your vehicle is being
refueled. Therefore, the auxiliary heating
must be switched off at gas stations. G
Warning
When transporting hazardous materials,
always observe the relevant safety
regulations.
Spray canisters and gas cartridges or other
pressurized containers carried in the vehicle 104
Climate control
Controls