See also:

General information
If you are no longer able to move the roller sunblind for the rear window after having activated it a number of times in a row, the system is blocked for a limited time to prevent overheating. ...

Charging the battery
In the vehicle, only charge the battery via the terminals in the engine compartment, with the engine switched off. ...

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