Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Additional heater/Parking heater
- Control module
- Water pump
- Fan shroud
- Fuel pump (FP) (in front of the fuel tank)
- Heat exchanger
The additional heater is only available in the diesel vehicles. The additional heater is standard in some markets (cold climates). The heater, which uses radiant heat from the engine at low loads or cold starts, is not capable of maintaining a comfortable passenger compartment temperature.
If an extra timer function (software) is installed for the additional heater, the diesel vehicle can use the additional heater as a parking heater.
Gasoline driven vehicles can use a parking heater with timer function.
The additional heater/parking heater are positioned inside the front fenders, in front of the front left wheel arch.
The heater consists of:
- the heater unit
- the combustion preheater module (CPM)
- the exhaust system
- the air intake
- the water pump.
The heater is connected to:
- the engine cooling system
- the vehicle fuel tank
- central electronic module (CEM).
Both versions have a fuel pump (FP) located on the right-hand side in front of the fuel tank.
Vehicles with the parking heater function use the turn signal lamp stalk to control the heater. The information appears in the driver information module (DIM).
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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