
Heating, Ventilation and Air conditioning183
Safety FirstOperating instructionsPractical tipsTe c h n i c a l  D a t a
WARNING
Never turn off the air fan for a long time or the air in the passenger compart-
ment will not be refreshed.
 xStuffy or used air will increase fatigue and reduce driver and passenger 
concentration possibly resulting in a serious accident.
Note
Not all Climatronic buttons are operational in REAR mode.
Note
The   button is locked in defrost mode.
Climate control user instructions
The cooling system only works when the engine is running and fan is 
switched on.
The climate control system operates most effectively with the windows and 
the sliding panoramic roof closed. However, if the vehicle has heated up after 
standing in the sun for some time, the air inside can be cooled more quickly 
by opening the windows briefly.
Keep the air vents in front of the windscreen free of snow, ice and leaves to 
ensure heating and cooling are not impaired and to prevent the windows 
from misting over.
Adjustment for safer driving
When the air conditioning is switched on, the temperature and the air 
humidity in the vehicle interior drop. Hence, when the outside air humidity is 
high, the windows do not mist over and comfort for the vehicle occupants is 
improved:
With Climatic
 xDisable air recirculation mode  Ÿpage 185.
 xSet the fan to setting 1 or 2.
 xTurn the temperature control to the centre position.
 xOpen the air outlets in the dash panel  Ÿpage 185.
 xTurn the air distribution control to the required position.
 xPress the   button to turn on cooling. The button will light up.
With Climatronic
 xPress the   button.
 xSet the temperature to +22 °C (+72 °F).
 xOpen the air outlets in the dash panel  Ÿpage 185.
REST
Climatronic: press the button   to use residual heat. When 
the engine is still warm but the ignition switched off, the heat 
given off by the engine can be used to keep the passenger 
compartment warm. The   button will light up when the 
function is switched on. The function will switch off after 
around 30 minutes and if the battery level is low. 
 p
Climatronic: transferring the driver's seat temperature settings 
to the other seats. If the   button is not lit up, the set tem-
perature in the driver's seat will also apply to the other seats.
Press the button or the temperature control for the front pas-
senger's seat or the rear seats to set them to a different tem-
perature. The button lights with an indicator.
Vehicles with auxiliary heating: observe the description of the 
 button.
AUTOAutomatic temperature, fan, and air distribution control.
Control 
button Additional information. Climatic  Ÿpage 181, fig. 129; Cli-
matronic  Ÿpage 181, fig. 130. 
REST
REST
 p
AUTO
REAR
AC
AUTO 

Heating, Ventilation and Air conditioning187
Safety FirstOperating instructionsPractical tipsTe c h n i c a l  D a t a
Auxiliary heater* (additional heater)
Introduction
The auxiliary heater is powered by fuel from the vehicle's fuel tank and can be 
used while the vehicle is in motion and at a standstill. Select the mode 
required (heat or fan)  Ÿpage 189 on the instrument panel.
In winter, the auxiliary heater can be used in heat mode before switching on 
the ignition to remove any ice, mist or snow from the windscreen (thin layers 
only).
Additional information and warnings:
 xSEAT information system  Ÿpage 70
 xRefuelling  Ÿpage 293
WARNING
The auxiliary heater fumes contain carbon dioxide, an odourless and 
colourless toxic gas. Carbon monoxide can cause people to lose conscious-
ness. It can also cause death.
 xNever switch on the auxiliary heater or leave it running in places that 
are enclosed or unventilated.
 xNever program the independent heating system to be activated and 
operated in closed, unventilated areas.
WARNING
The components of the auxiliary heater exhaust system heat up a great 
deal. This could cause a fire.
 xAlways park your vehicle so that no part of the exhaust system can 
come in contact with flammable materials (such as dried grass).
Caution
Never place food, medicines or other heat-sensitive objects close to the air 
vents. Food, medicines and other heat-sensitive objects may be damaged or 
made unsuitable for use by the air coming from the air vents.
Switching the auxiliary heater on and off
Switching the auxiliary heater on:
Manually using the instant on/off button. Ÿpage 1
81
Manually using the remote control. Ÿpage 1
88
Automatically at the programmed and enabled on 
time. Ÿpage 1
89
Switching the auxiliary heater off:
Manually using the instant on/off button for the cli-
mate control system. Ÿpage 1
81
Manually using the remote control. Ÿpage 1
88
Automatically after the programmed time. Ÿpage 1
89
Automatically when the light comes on  z (fuel 
reserve). Ÿpage 2
93
Automatically when the battery power drops to a very 
low level. Ÿpage 3
18
 >
ON
 >
OFF 

Heating, Ventilation and Air conditioning 188
Things to note
After switching the auxiliary heater off, it continues to run for a short period 
to completely burn any fuel remaining in the auxiliary heater. The exhaust 
fumes are also extracted from the system.
Remote control
The auxiliary heater may accidentally switch on if a button is pressed on the 
remote control by mistake. This may also occur outside the range of the 
remote control or if the light flashes.
Remote control light
The remote control light provides users with different information at the push 
of a button:
fig. 132Meaning
Switch the auxiliary heater on.
Switch the auxiliary heater off:
Aerial.
Light.
Fig. 132  Auxiliary heater: 
remote control.
ON
OFF
AA
AB
Battery light fig. 132  Meaning
Lights up green for around two 
seconds.The auxiliary heater has been switched on 
using the   button.
Lights up red for around two 
seconds.The auxiliary heater has been switched off 
using the   button.
Slowly flashes green for 
around two seconds.No ona) signal has been received.
Quickly flashes green for 
around two seconds.The auxiliary heater is locked.
Possible causes: the fuel tank is almost 
empty, the battery charge is very low or 
there is a fault.
Flashes red for around two 
seconds.No offa) signal has been received.
Lights up orange for around 
two seconds, then green or 
red.The remote control battery is almost flat. 
However, the on or off signal has been 
received, respectively.
Lights up orange for around 
two seconds, then flashes 
green or red.The remote control battery is almost flat. 
The on or off signal has not been received, 
respectively.
Flashes orange for around five 
seconds.The remote control battery is flat. The on or 
off signal has not been received, respec-
tively.
AB
ON
OFF