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
may be highly flammable and could explode if
heated.
In particular, make sure that the containers
described above are not placed in the hot air
flow from the
auxiliary heating system. Do not
stow such containers directly next to or on top
of the heater.
You could otherwise endanger yourself and
others.
The auxiliary heating system operates
independently of the engine and
complements the vehicle heating or air
conditioning.
You can set the auxiliary heating at an outside
temperature of up to 39 ‡ (4 †) in order to:
R pre-heat the vehicle interior
R additionally warm the coolant, thereby
conserving the engine and saving fuel
R support the vehicle's heating system while
the engine is running and outside
temperatures are low (heater booster
function)
i If the outside temperature rises above
39 ‡ (4 †), the auxiliary heating and heater
booster function switch off automatically.
! Switch on the auxiliary heating system at
regular intervals (at least once a month) for
approximately 10 minutes.
Make sure that the flow of hot air is not
blocked. Otherwise, the auxiliary heating
will overheat and switch off.
i If the interior motion sensor ( Y page 62)
is armed and the auxiliary heating is
switched on, it is possible that the interior
temperature monitoring may cause a false
alarm. In this case, either deactivate the
interior motion sensor or switch off the
auxiliary heating. Before switching on X
The fuel tank must be at least one-quarter
full.
X Set the desired temperature using the
temperature control of the heating or the
air-conditioning system (Y
page 100).
X Set the air distribution as required
(Y page 102).
X Open the center and side air vents and set
them to the middle position (Y page 101).
i The auxiliary heating automatically
switches to heater booster mode after the
engine is started.
Operating using the switch 0046
To switch the auxiliary heating on/off
0047 To switch the heater booster function on/
off (Y page 107)
X To switch on the auxiliary heating: press
the 0086
switch for longer than two
seconds.
R The auxiliary heating heats or ventilates
the interior to the temperature that you
have set.
R The blower switches to the lowest speed.
R The red indicator lamp in the switch
comes on. Climate control
105
Controls Z
X
To switch off the auxiliary heating: press
the 0086
switch.
or
X Turn the key to position 0 in the ignition
lock.
The red indicator lamp in the switch goes
out.
The auxiliary heating operates for about
another two minutes
and then switches off
automatically.
Selecting a switch-on time You can use the on-board computer to define
up to
three
switch-on times, one of which can
be selected.
On-board computer without steering
wheel buttons
X Turn the SmartKey to position 2 in the
ignition lock.
X Press the 0086 switch.
The 0086 symbol in the display flashes.
or
X Press the 007B menu button on the
instrument cluster repeatedly until the
0086 symbol flashes in the display.
X Use the 0069 or 006A
buttons on the instrument
cluster to select switch-on time 1 to 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 0086 switch comes
on.
If you have not preselected a switch-on time
and --:-- is
shown
in the display, this means
that automatic switch-on mode is
deactivated. The yellow indicator lamp in the
0086 switch goes out.
i If you turn the key to position 0 in the
ignition lock, the yellow indicator lamp in
the 0086 switch goes off after 30 minutes. The red indicator lamp in the
0086 switch
comes on when the auxiliary heating
switches on.
On-board computer with steering wheel
buttons
X Turn the SmartKey to position 2 in the
ignition lock.
X Press the 0086 switch.
The Aux. heating submenu is shown in
the display.
The selection marker highlights the
preselected switch-on
time,
or Timer off,
if no switch-on time has been preselected. i
You can also access the Aux. heating
submenu via the Settings(Y page 79)
menu.
X Use the 005A or 005B buttons on the
steering wheel
to
select the desired switch-
on time.
Use the Timer off setting to deactivate
automatic switch on.
X Press the 0059 menu button on the
steering wheel.
The switch-on time is selected. The yellow
indicator lamp in the 0086 switch comes
on.
i If you turn the key to position 0 in the
ignition lock, the yellow indicator lamp in
the 0086 switch goes
off after 30 minutes.
The red indicator lamp in the 0086 switch
comes on when the auxiliary heating
switches on. 106
Climate control
Controls
Setting the switch-on time
On-board computer without steering
wheel buttons
X
Use the same method to select a switch-on
time as described in the "Preselecting a
switch-on time" section.
X Press the 0048 reset button on the
instrument cluster to set the desired
switch-on time.
The hour display flashes.
X Use the 0069 and 006A buttons on the
instrument cluster to set the hours.
X Press the 0048 reset button.
The minute display flashes.
X Use the 0069 and 006A buttons to set the
minutes.
On-board computer with steering wheel
buttons
X Use the same method to select a switch-on
time as described in the "Preselecting a
switch-on time" section.
X Press the 0029 menu button on the
steering wheel.
The Hours submenu is shown in the
display.
X Press the 005A or 005B button on the
steering wheel to set the hours.
X Press the 0029 button.
The Minutes submenu is shown in the
display.
X Press the 005A or 005B button to set the
minutes.
X Press the 0059 button.
The switch-on time is set and selected.
Heater booster function If the outside temperature is lower than
39 ‡ (4 †), the fuel-operated auxiliary
heating heats the vehicle as quickly as
possible when the engine is running. The auxiliary heating automatically switches
to heater booster mode after the engine is
started.
i
If the outside temperature rises above
39 ‡ (4 †),
the auxiliary heating and heater
booster function switch off automatically. Vehicles with auxiliary heating
0046
To switch the auxiliary heating on/off
0047 To switch the heater booster function on/
off
X To switch on/off: press the 006C switch.
The indicator lamp
in the switch lights up if
the heater booster function is switched on.
After switching off, the auxiliary heating
operates for about another two minutes and
then switches off automatically.
If you switch
off the engine without switching
off the heater booster function, the system
will be switched on the next time the engine
is started (memory function). Climate control
107
Controls Z