See also:

Additives
Only use DEF in accordance with ISO 22241. Do not use additives with DEF and do not dilute DEF with water. This may destroy the BlueTEC exhaust gas aftertreatment system. ...

Problems with the sliding sunroof
Problem: the sunroof cannot be closed and you cannot see the cause. WARNING   You could be severely or even fatally injured when closing the sliding sunroof with increased closing force ...

Checking the vehicle and trailer weight
To check that the weights of the towing vehicle and the trailer comply with the maximum permissible values, have the vehicle/trailer combination (including the driver, passengers, and cargo w ...