Functional test of the parking heater

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:
Procedure:
  1. Apply the parking brake.
  2. Press the "OK" button to start the test.
  3. Monitor the parking heater status.
  4. Wait while the test is in progress.
  5. A dialogue shows "Function done". Press "OK".