Additional Heater/Parking Heater
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2009 Volvo S60, 2008 Volvo S60, 2007 Volvo S60, 2006 Volvo S60, and 2005 Volvo S60. However, it is still accessible from the selected car via links, so may be relevant.
The additional heater/parking heater produces heat by burning gasoline or diesel. The heat is distributed via the engine cooling system to the heat exchanger and on out into passenger compartment.
When the engine is running, the additional heater can provide extra heat to the passenger compartment in the event that the engine is unable to provide sufficient heat. When the engine is not running, the parking heater can heat the passenger compartment (and the engine). This function can be started directly or using a timer.
For further information about the additional heater/parking heater, see Design and Function, Additional and parking heater (combustion preheater module (CPM)).