Page 97 of 271

Heating and air conditioning system
96
Operational malfunctionsIf the cooling system does not operate at outside temperatures higher than +5 °C,
there is a problem in the system. The reasons for this may be:
The fuse on the air conditioning system has blown. Check the fuse, replace it if
necessary page 233.
The cooling system has switched off automatically for a short time because the
coolant temperature of the engine is too hot page 17.
If you are not able to rectify the operational problem yourself, or if the cooling capacity
decreases, switch the cooling system off. Contact a specialist garage.
Air outlet ventsThe information provided is valid for all vehicles.Fig. 99 Air vents at the front Fig. 100 Air vents at the rear
Open the air outlet vents 3 and 4– Turn the horizontal wheel (to the right)
fig. 99 .Open the air outlet vents 6– Turn the vertical wheel (between the end positions) fig. 100 .Close air outlet vents 3 and 4– Turn the horizontal wheel into the end position (to the left).Close air outlet vents 6– Turn the vertical wheel into the end position.Change air flow of air outlet vents 3 and 4– In order to change the strength of the air flow, swivel the horizontal lamellas with
the aid of the moveable adjuster.
– In order to change the lateral direction of the air flow, turn the vertical lamellas with the aid of the moveable adjuster.Change air flow of air outlet vents 6– In order to change the strength of the air flow, swivel the horizontal lamellas with
the aid of the vertical wheel upwards or downwards.
s2ug.6.book Page 96 Friday, April 9, 2010 2:24 PM
Page 98 of 271

Heating and air conditioning system97
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
– In order to change the lateral direction of the air flow, turn the vertical lamellas with
the aid of the horizontal wheel to the left or to the right.
The air outlet vents 3, 4 page 96, fig. 99 and 6 page 96, fig. 100 can be closed and
opened individually.
The air outlet vents 6 are only fitted on vehicles with higher centre console.
Warmed, unwarmed or cooled air will flow out of the air outlet vents according to the
setting of the regulator of the heating or the air conditioning system* and the atmos-
pheric conditions.
HeatingUsing the system
The heating system delivers air into the interior of the vehicle and
warms it as required.Fig. 101 Heating: Control elementsSetting temperature– Turn the control dial fig. 101 to the right in order to increase the temperature.
– Turn the control dial to the left in order to increase the temperature.
Controlling blower– Turn the blower switch into one of the po sitions, 1 to 4, in order to switch the
blower on.
– Turn the blower switch into position 0 in order to switch the blower off.
– If you wish to shut off the fresh air supply, use the button - recirculated air mode
in “Recirculated air mode” on page 99.Control for air distribution– You can adjust the direction of the air flow using the air distribution control
page 96.Rear window heater– Press button . Further information page 62, “Rear window and windscreen
heater”.Auxiliary heating (auxiliary heating)*– Press the button in order to directly switch on/off the auxiliary heating (auxiliary
heating and ventilation). Further information page 105, “Auxiliary heating (auxil-
iary heating and ventilation)*”.
The blower should aways be on to prevent the windows from misting up.
Note
T h e w h o l e h e a t o u t p u t w i l l b e n e e d e d t o u n f ro s t t h e w i n d s c re e n a n d s i d e w i n d o w s .
No warm air will be fed to the footwell. Th is can lead to restriction of the heating
comfort.
Please refer to the information regarding recirculated air mode page 99.
AAAA
ABAB
A1
AC
A2A3
s2ug.6.book Page 97 Friday, April 9, 2010 2:24 PM
Page 99 of 271
Heating and air conditioning system
98
Set heatingRecommended settings of heating controls for:
Note
We recommend that you leave the air outlet vents 3 page 96, fig. 99 in the opened
position.
Setup
Setting of the control dial
Button
Air outlet vents 4
Defrosting the windscreen and side
windows
To the right up to the
stop
3
Do not switch on
Open and align with the side win- dow
Free windscreen and side windows
from mist
Desired temperature
2 or 3
Do not switch on
Open and align with the side win-dow
The fastest heating
To the right up to the stop
3
briefly switched on
Opening
Comfortable heating
Desired temperature
2 or 3
/
Do not switch on
Opening
Fresh air mode - ventilation
To the left up to the
stop
Desired position
Do not switch on
Opening
A1
AA
AB
AC
s2ug.6.book Page 98 Friday, April 9, 2010 2:24 PM
Page 100 of 271

Heating and air conditioning system99
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Recirculated air mode
In recirculated air mode air is sucked out of the interior of the vehicle
and then fed back into the interior.Recirculated air mode prevents polluted air outside the vehicle from getting into the
vehicle, for example when driving through a tunnel or when standi ng in a traffic jam.Switching recirculated air mode on– Press the button - the warning light lights up in the button page 97, fig. 101 .Switching recirculated air mode off– Press again the button - the warning light in the button goes out.
The recirculated air mode is switched off automatically if the air distribution control
is in position
page 97, fig. 101. You can also switch recirculated air mode on
again from this setting by repeatedly pressing button .
WARNING
You should not leave recirculated air mode on over a longer period of time, as
“stale” air may result in fatigue in the driver and occupants, divert your atten-
tion and also cause the windows to mist up. The risk of having an accident
increases. Switch recirculated air mode off as soon as the windows begin
misting up.Climatic* (semi-automatic air conditioning system)Description
The Climatic is a combined coolin g and heating system. It makes it
possible to optimally control the air temperature at any season of the
year.Description of the Climatic
It is important for your safety and for your driving comfort that the Climatic is operating
properly. The cooling only operat
es if the button fig. 102 is pressed, and the following
conditions are met:
engine running,
outside temperature above approx. +2°C and
blower switch switched on (positions 1 to 4).
Air at a temperature of about 5°C may flow out of the vents under certain circum-
stances when the cooling system is operating. Lengthy and uneven distribution of the
air flow out of the vents and large differences in temperature, for example when getting
out of the vehicle, can result in chills in sensitive persons.Note
We recommend that you do not smoke in the vehicle when the recirculating air
mode is operating since the smoke which is drawn at the evaporator from the interior
of the vehicle forms deposits in the evapor ator of the air conditioning system. This
produces a permanent odour when the air conditioning system is operating which can
only be eliminated through considerable effort and expense (replacement of
compressor).
Using the systemFig. 102 Climatic: Control elements
AC
AC
A1
s2ug.6.book Page 99 Friday, April 9, 2010 2:24 PM
Page 101 of 271

Heating and air conditioning system
100
Setting temperature
– Turn the control dial page 99, fig. 102 to the right in order to increase the
temperature.
– Turn the control dial to the left in order to increase the temperature.Controlling blower– Turn the blower switch into one of the po sitions, 1 to 4, in order to switch the
blower on.
– Turn the blower switch into position 0 in order to switch the blower off.
– If you wish to shut off the fresh air supp ly, use the button - recirculated air
mode page 102.Control for air distribution– You can adjust the direction of the air flow using the air distribution control
page 96.Switching cooling on and off– Press the button page 99, fig. 102 . The warning light lights up in the
button.
– When you again press the switch , the cooling system is switched off. The warning light in the button goes out.Rear window heater– Press button . Further information page 62, “Rear window and wind-
screen heater”.Auxiliary heating (auxiliary heating)– Press the button in order to directly switch on/off the auxiliary heating
(auxiliary heating and ventil ation. Further information page 105, “Auxiliary
heating (auxiliary heat ing and ventilation)*”.
The set temperature will be automatically maintained other than when the
control dial is on the extreme right or extreme left position:
Extreme right position - full heating;
Extreme left position - full cooling;
The blower should aways be on to prevent the windows from misting up.Note
The whole heat output will be needed to unfrost the windscreen and side windows.
No warm air will be fed to the footwell. Th is can lead to restriction of the heating
comfort.
The used air streams out through the air removal openings in the luggage compart-
ment.
If the cooling system has not been switched on for a lengthy period, odours may
be produced at the evaporator because of deposits. Switch the cooling system on at
least once a month for approximately 5 minutes at the highest blower stage - also
during the cold season of the year - in order to avoid such odours. Also open a window
for a short time.
Please refer to the information regarding recirculated air mode page 102.
AAAAABAB
A4
AC
AC
A1
AC
A2A3
s2ug.6.book Page 100 Friday, April 9, 2010 2:24 PM
Page 102 of 271

Heating and air conditioning system101
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Set ClimaticRecommended settings of Climatic controls for the respective operating modes:
Note
We recommend that you leave the air outlet vents 3 page 96, fig. 99 in the opened
position.
Setup
Setting of the control dial
Button
Air outlet vents 4
Defrosting the windscreen and
side windows
recommended 22°C
3
Switched off
Do not switch on
Open and align with the side
window
Free windscreen and side win-
dows from mist
Desired tempera-ture
2
switched on
Do not switch on
Open and align with the side window
The fastest heating
recommended 22°C
3
Switched off
briefly switched on
Opening
Comfortable heating
Desired tempera-ture
2 or 3
Switched off
Do not switch on
Opening
the fastest cooling
recommended 22°C
briefly4, then 2or
3
switched on
briefly switched on
Opening
optimal cooling
Desired tempera-ture
1, 2 or 3
switched on
Do not switch on
open and align to the roof
Fresh air mode - ventilation
To the left up to the stop
Desired position
Switched off
Do not switch on
Opening
AA
AB
AC
A1
A4
s2ug.6.book Page 101 Friday, April 9, 2010 2:24 PM
Page 103 of 271

Heating and air conditioning system
102
Recirculated air mode
In recirculated air mode air is sucked out of the interior of the vehicle
and then fed back into the interior.Recirculated air mode prevents polluted air outside the vehicle from getting into the
vehicle, for example when driving through a tunnel or when standi ng in a traffic jam.Switching recirculated air mode on– Press the button page 99, fig. 102 the warning light lights up in the
button.Switching recirculated air mode off– Press again the button - the warning light in the button goes out.
The recirculated air mode is switched off automatically if the air distribution control
is in position
page 99, fig. 102. You can also switch recirculated air mode on
again from this setting by repeatedly pressing button .
WARNING
You should not leave recirculated air mode on over a longer period of time,
as “stale” air may result in fatigue in the driver and occupants, divert your
attention and also cause the windows to mist up. The risk of having an accident
increases. Switch recirculated air mode off as soon as the windows begin
misting up.
Climatronic* (automatic air conditioning)Description
The Climatronic system is a combination of an automatic heating, fresh
air and cooling system which provides optimal comfort for the occu-
pants of the car.The Climatronic maintains fu lly automatically a convenience temperature. This is
achieved by automatically varying the temper ature of the outflowing air, the blower stages and the air distribution. The system also takes into account sunlight which elim-
inates the need to alter the settings manually. The
automatic mode page 103
ensures maximum wellbeing of the occupants at all times of the year.
Description of Climatronic system
The cooling operates only if the following conditions are met:
engine running,
outside temperature above approx. +2°C,
switched on.
The AC compressor is switched off at a high coolant temperature in order to provide
cooling at a high load of the engine.
Recommended setting for all periods of the year:
Set the desired temperature, we recommend 22°C.
Press the button fig. 103 .
Move the air outlet vents 3 and 4 page 96, fig. 99 , so that the air flow is directed
slightly upwards.Note
On vehicles equipped with a factory-fitted radio* or navigation*, the information
of the Climatronic is also shown on the display. This function can be switched off, see
operating instructions of the radio* or the navigation system*.
A4
AC
AC
AUTO
s2ug.6.book Page 102 Friday, April 9, 2010 2:24 PM
Page 104 of 271

Heating and air conditioning system103
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Overview of the control elements
The controls enable a separate setting of the temperature for the left
and right side.Fig. 103 Climatronic: Control elementsThe buttons
Defrost windscreen intensively
Air flow to the windows
Air flow to head
Air flow in the footwell
Recirculated air mode with air quality sensor
Rear window heater
Buttons / control dial Setting of the temperature for the left side, operation of the seat heating of the left
front seat*
Automatic mode
Switching off Climatronic
Setting the blower speed
Button for direct switching on/off of auxiliary heating* page 105, or
switching on/off of windscreen heater*
Switching on/off of the temperature setting in dual mode Switching cooling on and off
Setting of the temperature for the right side, operation of the seat heating of the
right front seat*
Note
Below the top row of buttons is located the interior temperature sensor. Do not glue
or cover over the sensor, otherwise it co
uld have an unfavourable effect on the
Climatronic.Automatic mode
The automatic mode is used in orde r to maintain a constant tempera-
ture and to demist the windows in the interior of the car.Switching automatic mode on– Set a temperature between +18 °C and +26 °C.
– Move the air outlet vents 3 and 4 page 96, fig. 99 , so that the air flow is directed
slightly upwards.
– Press the button . In the right or left top corner a warning light lights up, depending on which unit was last selected.
If the warning light in the top right corner of the button lights up, the
Climatronic operates in “HIGH” mode. The “HIGH” mode is the standard setting of the
Climatronic.
When pressing again the button , the Climatronic changes into the “LOW” mode
and the warning light in the top left corner lights up. The Climatronic uses only in this
mode the lower blower speed. However taking into account the noise level, this is
more comfortable, yet be aware that the effectiveness of the air conditioning system is
reduced particularly if th e vehicle is fully occupied.
By pressing again the button , yo u change into the “HIGH” mode.
The automatic mode is switched off by pres sing the button for the air distribution or
increasing or decreasing the blower speed. The temperature is nevertheless
regulated.
A1
A2
A3
A4
A5
A6
A7A8
AUTO
A9
OFF
A10
A11
A12
DUAL
A13
AC
A14
AUTO
AUTO
AUTOAUTO
s2ug.6.book Page 103 Friday, April 9, 2010 2:24 PM