The heater has two subfunctions:
- Parking heater - heats the engine and passenger compartment, if necessary, when the parking climate control's preconditioning* is activated.
- Additional heater - heats the passenger compartment and engine, if necessary, during driving.
The heater is fuel-driven and is fitted in the front right-hand wheel housing.
When the heater is running, smoke may be emitted from the right-hand front wheel housing and a low hum may be heard. A ticking sound from the fuel pump may also be heard from the rear section of the car. This is perfectly normal.
Battery and charging
The heater is powered by the car's starter battery. If the charge level of the starter battery is too low, then the heater is switched off automatically and the driver display shows a message.
Make sure that there is enough charge in the battery if the heater needs to be used.
Fuel and refuelling
Warning label on fuel filler flap.
The heater uses fuel from the car's normal fuel tank.
If the car is parked on a steep hill, the front of the car should point downhill to ensure that there is a supply of fuel to the heater.
If the level in the fuel tank is too low then the heater is switched off automatically and the driver display shows a message.
Make sure there is enough fuel in the car's normal fuel tank if the heater needs to be used.
Fuel which spills out could be ignited. Switch off the fuel-driven heater before starting to refuel.
Check in the driver display that the heater is switched off. This symbol is lit when it is working as a parking heater.