See also:

Malfunction
A Check Control message is displayed. Adaptive light control is malfunctioning or has failed. Have the system checked as soon as possible. ...

Adjusting
The parking lamps or low beams must be switched on to adjust the brightness. Adjust the brightness using the thumbwheel. ...

Automatic deactivation during forward travel
The system switches off when a certain driving distance or speed is exceeded. Switch the system back on if necessary. ...