Auxiliary Heater (Diesel Engines Only)
WARNING: This page is about a different variant/trim than selected.
An auxiliary heater comes as standard on diesel-engined vehicles in certain markets (cold climates). This function is used to provide extra heat to the climate control system. The auxiliary heater works the same as the parking heater, but with other start conditions. The start conditions are governed by the climate control module (CCM) (4/6).
The climate control module (CCM) requests that the heater is started.
Certain conditions must be met before the heater can start. These are:
- outside temperature below +5 °C/41 °F (the heater switches off at +8 °C/46.4 °F)
- engine speed (RPM) greater than 500 rpm
- quantity of fuel more than 7.5 liters for the engine coolant heater and 4.5 liters for the parking heater
- no diagnostic trouble code that prevents heater start is stored in the combustion preheater module (CPM)
- an airbag has not deployed.
When the heater is activated the information lamp illuminates and a message is displayed in the driver information module (DIM) (5/1).