See also:

Service menu
In the Serv. menu you can: - call up display messages - restart the tire pressure loss warning system (Canada only) - check the tire pressure electronically - call up the service due date ...

Purity
Assuring the purity of DEF is particularly important with respect to avoiding malfunctions in the exhaust gas aftertreatment system. If DEF is pumped out of the DEF tank, e.g. during repair wor ...

System self-test
After you have switched on the ignition, the system carries out a self-diagnosis. WARNING   A malfunction in the system has been detected if one of the following conditions occurs: • t ...