See also:

Diagnosis OBD
On the driver's side is an OBD socket for checking components relevant to the composition of the vehicle's emissions. ...

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. ...

Deactivating HDC
Press the button again and the LED goes out. HDC is automatically deactivated above approx. 37 mph/60 km/h. ...