Fuel Driven Parking Heater
The driver sets the desired departure time using one of the two timer functions in the display on the driver information module (DIM) (5/1). The time is programmed by twisting the ring on the control stalk and by pressing the SET button for the desired time (timer 1, timer 2 or direct start).
If the engine has not run since the last timer controlled start of the heater, the combustion preheater module (CPM) (4/7) will not permit the heater to be started again until the engine has been started.
The central electronic module (CEM) (4/56) receives information about the desired departure time from the steering wheel module (SWM) (3/254) and the driver information module (DIM).
Approximately 50 minutes before the desired departure time, the central electronic module (CEM) transmits information to the combustion preheater module (CPM) about:
- outside temperature
- quantity of fuel
- the operating status of the vehicle
- a request to calculate the start time of the heater.
The combustion preheater module (CPM) calculates the start time, based on information from the central electronic module (CEM), and starts the heater at the calculated time. The heater calculates when start is required (15-50 minutes before the intended departure at temperatures between -10 °C and +15 °C).
The run time of the heater is a maximum of 60 minutes at temperatures lower than -10 °C.
The running time of the heater is at least 15 minutes before the planned departure (temperatures between +15 °C and +25 °C).
When the heater is started directly using the control stalk, it runs until it is shut off or for a maximum of 60 minutes. The heater remains activated for 10 minutes after the set time to allow for the driver getting to the car late. A text message is displayed in the driver information module (DIM) when the heater is running.