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. ...

Notes
The vehicle equipment does not include a spare tire. When using run-flat tires* or tire sealants, a tire does not need to be changed immediately in the event of pressure loss due to a flat tire ...

Maintaining/storing the speed
Press the button*. When the system is switched on, the current speed is maintained and stored as the desired speed. It is displayed in the speedometer and briefly displayed in the instrument ...