Oil change

An oil change should be carried out by your service center only.

Coolant

    See also:

    Malfunction
    Comfort Access may not function properly if it experiences interference from external sources such as mobile phones, metal objects, overhead power lines, transmission towers, etc. In this case, ...

    Capacities
    ...

    Deleting all stored programs
    Press both outer memory buttons 1 for approx. 20 seconds until the LED flashes rapidly. All stored programs are deleted. The programs cannot be deleted individually. ...