See also:

Initialization after a power failure
After a power failure, it is only possible to raise the roof, if necessary. Have the system initialized by your service center. ...

Information on the navigation data
1. "Navigation". 2. "Options" Open. 3. "Navigation system version": information on the data version is displayed. ...

Fuses
Replacing fuses Never attempt to repair a blown fuse and do not replace a defective fuse with a substitute of another color or amperage rating; this could lead to a circuit overload, ultimate ...