See also:

Message memory
The on-board computer saves certain display messages. You can call up the display messages in the message memory. Press the or button on the steering wheel to select the Service menu. If t ...

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 wo ...

Rim
This is the part of the wheel on which the tire is mounted. ...