
A
To direct the airflow through the footwell vents
B To switch the seat heating on the left-hand side on/off Information on using THERMATIC
automatic climate control
The following contains notes and recommenda-
tions on optimum use of THERMATIC automatic climate control.
R Activate climate control using the Ãand
Á buttons. The indicator lamps in the
à andÁ buttons light up.
R Set the temperature to 22 †.
R Only use the "Windscreen demisting" function
briefly until the windscreen is clear again.
R Only use air-recirculation mode briefly, e.g. if
there are unpleasant outside odours or when
in a tunnel. The windows could otherwise mist
up as no fresh air is drawn into the vehicle in air-recirculation mode.
R Use the ZONE function to adopt the temper-
ature settings on the driver's side for the
front-passenger side as well. The indicator
lamp above the ábutton goes out.
R If you change the settings of the climate con-
trol system, the climate status display
appears for approximately three seconds at
the bottom of the screen in the multimedia
system display. You will see the current set-
tings of the various climate control functions.
During automatic engine switch-off, the climate
control only operates at a reduced capacity. If
you require the full climate control output, you
can switch off the ECO start/stop function by
pressing the ECO button (Y page 151).128
Overview of climate control systemsClimate control 

Control panel for THERMOTRONIC automatic climate control (3-zone)
Front control panel
: To set the temperature, left (Y page 132)
; To demist the windscreen (Y page 134)
= To switch the residual heat on/off (Y page 137)
? To activate/deactivate cooling with air dehumidification (Y page 130)
A To switch the rear window heating on/off (Y page 135)
B To set the temperature, right (Y page 132)
C To switch the ZONE function on/off (Y page 134)
D To switch the climate control on/off (Y page 130)
E To set the air distribution (Y page 133)
F To increase the airflow (Y page 133)
G To reduce the airflow (Y page 133)
H Display
I To set the climate mode (Y page 132)
J To switch air-recirculation mode on/off (Y page 136)
K To set climate control to automatic mode (Y page 132)
Rear control panel
L To increase the airflow (Y page 133)
M To set the temperature (Y page 132)
N To control the rear-compartment climate control automatically (Y page 132)
O To direct the airflow through the rear air vents (Y page 133)
P To switch the seat heating on the right-hand side on/off (Y page 105)
Q To direct the airflow through the footwell vents (Y page 133)
R To switch the rear climate control on/off (Y page 130)
S To reduce the airflow (Y page 133)
T To switch the seat heating on the left-hand side on/off (Y page 105) Overview of climate control systems
129Climate control 

Information on using THERMOTRONIC
automatic climate control
The following contains instructions and recom-
mendations to enable you to get the most out of your THERMOTRONIC automatic climate con-
trol.
R Activate climate control using the Ãand
¿ buttons. The indicator lamps above the
à and¿ buttons light up.
R In automatic mode, you can also use the ñ
button to set a climate mode (FOCUS/
MEDIUM/DIFFUSE). The MEDIUM level is
recommended.
R Set the temperature to 22 †.
R Only use the "Windscreen demisting" function
briefly until the windscreen is clear again.
R Only use air-recirculation mode briefly, e.g. if
there are unpleasant outside odours or when
in a tunnel. The windows could otherwise mist up as no fresh air is drawn into the vehicle inair-recirculation mode.
R Use the ZONE function to adopt the temper-
ature settings on the driver's side for the
front-passenger side and the rear compart-
ment as well. The indicator lamp above the
á button goes out.
R Use the residual heat function if you want to
heat or ventilate the vehicle interior when the
ignition is switched off. The residual heat
function can only be activated or deactivated with the ignition switched off.
R If you change the settings of the climate con-
trol system, the climate status display
appears for approximately three seconds at
the bottom of the screen in the multimedia
system display. You will see the current set-
tings of the various climate control functions.
During automatic engine switch-off, the climate
control only operates at a reduced capacity. If
you require the full climate control output, you
can switch off the ECO start/stop function by
pressing the ECO button (Y page 151). Operating the climate control system
Switching the climate control on/off
General notes When the climate control is switched off, the air
supply and air circulation are also switched off.
The windows could mist up. Therefore, only
switch off climate control briefly.
i Switch on climate control primarily using
the à button (Y page 132).
In the rear-compartment, you can also switch
climate control on/off using the Ãand^
buttons.
Activating/deactivating X
Turn the key to position 2in the ignition lock
(Y page 146).
X To activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Airflow and air distribution are set to auto-
matic mode.
or X Press the ^button.
The indicator lamp in the ^button goes
out. The previous settings are reactivated.
X To deactivate: press the^button.
The indicator lamp in the ^button lights
up. Activating/deactivating cooling with
air dehumidification
General notes If you deactivate the "Cooling with air dehumid-
ification" function, the air inside the vehicle will
not be cooled. The air inside the vehicle will also
not be dehumidified. The windows can mist up
more quickly. Therefore, only deactivate the
"Cooling with air dehumidification" function
briefly.
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 cooling mode is active. This is
normal and not a sign that there is a malfunc-
tion. 130
Operating the climate control systemClimate cont
rol 

i
You can use THERMOTRONIC automatic cli-
mate control to set the airflow in the rear
compartment separately. Switching the ZONE function on/off
X To activate: press theábutton.
The indicator lamp above the ábutton
lights up.
THERMATIC automatic climate control: the
temperature setting for the driver's side is not
adopted for the front-passenger side.
THERMOTRONIC automatic climate control:
the temperature setting for the driver's side is
not adopted for the front-passenger side and
the rear compartment.
X To deactivate: press theábutton.
The indicator lamp above the ábutton
goes out.
THERMATIC automatic climate control: the
temperature setting for the driver's side is
adopted for the front-passenger side.
THERMOTRONIC automatic climate control:
the temperature setting for the driver's side is adopted for the front-passenger side and the rear compartment. Demisting the windscreen
General notes You can use this function to defrost the wind-
screen or to demist the inside of the windscreen
and the front side windows.
Switch off the windscreen demisting function as
soon as the windscreen is clear again.
Switching on/off X
Turn the key to position 2in the ignition lock
(Y page 146).
X To activate: press the¬button.
The indicator lamp in the ¬button lights
up.
The climate control system switches to the
following functions:
R high airflow
R high temperature R
air distribution to the windscreen and front
side windows
R air-recirculation mode off
X To deactivate: press the¬button.
The indicator lamp in the ¬button goes
out. The previous settings are reactivated.
Air-recirculation mode remains deactivated.
or X Press the Ãbutton.
The indicator lamp in the ¬button goes
out. Airflow and air distribution are set to
automatic mode.
or X Turn control :orB anti-clockwise or clock-
wise:
THERMATIC automatic climate control
(Y page 127)
THERMOTRONIC automatic climate control
(Y page 129)
or
X Press the KorI button. Demisting the windows
Windows misted up on the inside X
Activate the ¿orÁ cooling with air
dehumidification function.
X Activate automatic mode Ã.
X If the windows continue to mist up, activate
the "Windscreen demisting" function
(Y page 134).
i You should only select this setting until the
windscreen is clear again.
Windows misted up on the outside X
Switch on the windscreen wipers.
X Press the _button repeatedly until the
P orO symbol appears in the display.
i You should only select this setting until the
windscreen is clear again.
i If you clean the windows regularly, they do
not mist up so quickly. 134
Operating the climate control systemClimate control 

Rear window heating
General notes The rear window heating has a high current
draw. You should therefore switch it off as soon
as the window is clear. It otherwise switches off automatically after several minutes.
If the battery voltage is too low, the rear window
heating may switch off.
Switching on/off X
Turn the key to position 2in the ignition lock
(Y page 146).
X Press the ¤button.
The indicator lamp in the ¤button lights
up or goes out. Operating the climate control system
135Climate control 

Problems with the rear window heating
Problem
Possible causes/consequences and
M
MSolutions The rear window heating
has switched off prema-
turely or cannot be
switched on. The battery has not been sufficiently charged.
X Switch off any consumers that are not required, e.g. reading lamps,
interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window heating
can be switched on again. Switching air-recirculation mode
on/off
General notes You can deactivate the flow of fresh air tempo-
rarily if unpleasant odours are entering the vehi-
cle from outside. The air already inside the vehi- cle will then be recirculated.
If you switch on air-recirculation mode, the win-
dows can mist up more quickly, in particular at
low temperatures. Only use air-recirculation
mode briefly to prevent the windows from mist- ing up.
Switching on/off X
Turn the key to position 2in the ignition lock
(Y page 146).
X To activate: press thedbutton.
The indicator lamp in the dbutton lights
up.
i In the event of high pollution levels
(THERMOTRONIC automatic climate control
only) or at high outside temperatures, air-
recirculation mode is automatically activated.
When air-recirculation mode is activated
automatically, the indicator lamp in the d
button is not lit.
Outside air is added after about 30 minutes.
X To deactivate: press thedbutton.
The indicator lamp in the dbutton goes
out.
i Air-recirculation mode is deactivated auto-
matically:
R after approximately five minutes at outside
temperatures below approximately 5 †
R after approximately five minutes if cooling
with air dehumidification is deactivated
R after approximately 30 minutes at outside
temperatures above approximately 5 † if the "Cooling with air dehumidification"
function is activated Convenience opening/closing using
the air-recirculation button
G
WARNING
When the convenience closing feature is oper- ating, parts of the body could become trapped
in the closing area of the side window and the
sliding sunroof. There is a risk of injury.
Observe the complete closing procedure
when the convenience closing feature is oper-
ating. When closing make sure that no parts of the body are in the closing area. G
WARNING
During convenience opening parts of the body could be drawn in or become trapped
between the side window and window frame.
There is a risk of injury.
When opening, make sure that nobody is
touching the side window. If someone
becomes trapped, immediately press
the W switch in the door to stop the move-
ment of the side windows. To continue closing
the side window, pull on the Wswitch.
X Convenience closing feature (vehicles
with panorama sliding sunroof):
press and
hold the dbutton until the side windows
and the panorama sliding sunroof are closed. The indicator lamp in the dbutton lights
up. Air-recirculation mode is activated.
X Convenience closing feature (vehicles
without panorama sliding sunroof):
press136
Operating the climate control systemClimate control 

and hold the
dbutton until the side win-
dows are closed.
The indicator lamp in the dbutton lights
up. Air-recirculation mode is activated.
If parts of the body are in the closing area during convenience closing, proceed as follows:
X Press the Wbutton to stop the side win-
dows.
The side windows stop.
X To then open the side window, press the W
button again.
or
X Press and hold the dbutton again for at
least two seconds.
The side windows move in the opposite direc- tion.
X Only vehicles with panorama sliding sun-
roof:
press the 3switch for stopping the
panorama sliding sunroof.
The panorama sliding sunroof stops.
X To then open the panorama sliding sunroof,
pull back on the 3switch.
i Notes on the automatic reversing feature
for:
R the side windows (Y page 92)
R the panorama sliding sunroof (Y page 97)
X Convenience opening feature (vehicles
with panorama sliding sunroof): press and
hold the dbutton until the side windows
and the panorama sliding sunroof are open.
The side windows and the panorama sliding
sunroof move back to their original position.
The indicator lamp in the dbutton goes
out. Air-recirculation mode is deactivated.
X Convenience opening feature (vehicles
without panorama sliding sunroof):
press
and hold the dbutton until the side win-
dows are open. The side windows move back to their original positions.
The indicator lamp in the dbutton goes
out. Air-recirculation mode is deactivated.
i If you open the side windows or the pano-
rama sliding sunroof manually after closing
with the convenience closing feature, they
will remain in this position when opened using
the convenience opening feature. Switching the residual heat on/off
General notes It is possible to make use of the residual heat of
the engine to continue heating the stationary
vehicle for up to 30 minutesafter the engine has
been switched off. The heating time depends on
the set interior temperature.
Switching on/off X
To switch on: press theÌorÁ button.
The indicator lamp in the ÌorÁ button
lights up.
i The blower will run at a low speed regardless
of the airflow setting.
i If you activate the residual heat function at
high temperatures, only the ventilation will be
activated. The blower runs at medium speed.
X To switch off: press theÌorÁ but-
ton.
The indicator lamp in the ÌorÁ button
goes out.
Residual heat is deactivated automatically:
R after approximately 30 minutes
R when the ignition is switched on
R if the battery voltage drops
R when the auxiliary heating is switched on Ionisation
Ionisation is used to purify and freshen the air in
the vehicle interior, which is conducive to a
pleasant climate.
The ionisation of the interior air is odourless and cannot, directly, be perceived in the vehicle inte-
rior.
You can switch ionisation on and off via the mul- timedia system (see the separate operating
instructions).
Ionisation can only be operated when the auto-
matic climate control is switched on. The side air vent on the driver's side must be open. Operating the climate control system
137Climate control Z 

Auxiliary heating
Important safety notes G
DANGER
If the exhaust pipe is blocked or sufficient
ventilation is not possible, toxic exhaust
fumes can enter the vehicle, especially car-
bon monoxide. This is the case, e.g. in
enclosed spaces, or if the vehicle is stuck in
snow. There is a risk of fatal injuries.
You should switch off the auxiliary heating in
enclosed spaces which do not have an extrac- tion system, e.g. a garage. If the vehicle is
stuck in snow and you must leave the auxiliary
heating running, keep the exhaust pipe and
the area around the vehicle clear of snow. To guarantee a sufficient supply of fresh air, open
a window on the side of the vehicle away from the wind. G
WARNING
When the auxiliary heating is switched on,
parts of the vehicle can become very hot.
Flammable materials such as leaves, grass or twigs may ignite if they come into contact
with:
R hot parts of the exhaust system
R the exhaust gas itself
There is a risk of fire.
When the auxiliary heating is switched on,
make sure that:
R no flammable materials come into contact
with hot vehicle components
R the exhaust gas can escape from the
exhaust pipe unhindered
R the exhaust gas does not come into contact
with flammable materials.
The auxiliary heating is fitted under the front
wing on the left-hand side of the vehicle. The
emissions outlet is found behind the left front
wheel.
! Operating the auxiliary heating/ventilation
draws on the vehicle battery. After you have
heated or ventilated the vehicle a maximum of two times, drive for a longer distance. Switch the auxiliary heating on regularly once a
month for about ten minutes.
The auxiliary heating heats the air in the vehicle
interior to the set temperature. This occurs with- out using the heat of the running engine. The
auxiliary heating is operated directly using the
vehicle's fuel. For this reason, the tank content
must be at least at reserve fuel level to ensure
that the auxiliary heating functions.
The auxiliary heating or auxiliary ventilation
automatically adjusts to changes in tempera-
ture and weather conditions. For this reason,
the auxiliary heating could switch from ventila-
tion mode to heating mode or from heating
mode to ventilation mode.
The auxiliary heating switches off when the
engine is switched off. The auxiliary ventilation
switches off when you turn the key to position 2
(Y page 146).
The auxiliary heating switches off automatically after 50 minute s.This time limit can be altered.
To do this, visit a qualified specialist workshop.
You cannot use the auxiliary ventilation to cool
the vehicle interior to a temperature lower than
the outside temperature.
Before switching on X
Turn the key to position 2in the ignition lock
(Y page 146).
X Set the desired temperature.
The auxiliary heating/ventilation can be activa-
ted even when climate control is set to manual.
Optimum comfort can be attained when the sys-
tem is set to automatic mode. Set the temper-
ature to 22 †.
The auxiliary heating or auxiliary ventilation can
be switched on/off using the button on the
centre console or the remote control.
The on-board computer can be used to specify
up to three departure times, one of which may
be preselected (Y page 247).138
Operating the climate control systemClimate control