See also:

Setting the footwell temperature
The footwell temperature can be set via COMAND. ...

Connecting an external device
Do not leave external devices in the vehicle as extreme temperatures (e.g. direct sunlight or extremely low outside temperatures) could cause them to malfunction (see the operating instructions ...

General information
Do not exceed the legally prescribed maximum speed for vehicle/trailer combinations in the relevant country. This lowers the risk of an accident. Only install an approved trailer coupling on y ...