This function is used to unlock the heater lock. It is only available when the parking heater is in the locked position. The test is self-evaluation and shows the parking heater status during the test. The test takes about 3 minutes to perform.
Test prerequisites:
Battery voltage above 20 V.
The parking brake must be applied.
Ignition on.
Procedure:
Apply the parking brake.
Press the "OK" button to start the test.
Monitor the parking heater status.
Wait while the test is in progress.
A dialogue shows "Function done". Press "OK".
If the function fails, check the test conditions and repair any faults.