Switching the hot-water auxiliary heater on/off with the button
DANGER Risk of fatal injury due to poisonous exhaust gases
If the tailpipe is blocked or sufficient ventilation is not possible, poisonous exhaust gases such as carbon monoxide may enter the vehicle. This is the case in enclosed spaces or if the vehicle gets stuck in snow, for example.
Always switch the stationary heater off in enclosed spaces without an air extraction system, e.g. in garages.
Keep the tailpipe and the area around the vehicle free from snow when the engine or the stationary heater is running.
Open a window on the side of the vehicle facing away from the wind to ensure an adequate supply of fresh air.
WARNING Risk of fire due to hot stationary heater components and exhaust gases
Flammable materials such as leaves, grass or twigs may ignite.
When the stationary heater is switched on, make sure that:
hot vehicle parts do not come into contact with flammable materials.
the exhaust gas can flow out of the stationary heater exhaust pipe unhindered.
the exhaust gas does not come into contact with flammable materials.
NOTE Battery discharge caused by stationary heater or stationary ventilation operation
Operating the stationary heater or stationary ventilation drains the battery.
After heating or ventilating the vehicle twice, drive for a longer period of time.
Requirements:
The fuel tank is filled above the reserve level.
To switch the auxiliary heating on and off:
press the 
button. To activate the specified temperature:
switch on the vehicle and press the button. To deactivate the specified temperature:
press the button. To set the specified temperature:
set the temperature using the 
button and press the button. Colours of the indicator lamp:
Blue: stationary ventilation has been switched on.
Red: the stationary heater has been switched on.
Yellow: a departure time has been preselected.
The stationary heater or stationary ventilation switches off after a maximum of 50 minutes.
To activate the heater booster mode:
switch on the vehicle and press the button. To switch off heater booster mode:
press the button.