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 work, it must not be returned to the tank. The purity of the fluid can no longer be guaranteed.
Impurities in DEF (e.g. due to other
service products, cleaning agents or dust)
lead to:
- increased emission values
- damage to the catalytic converter
- engine damage
- malfunctions in the BlueTEC exhaust gas aftertreatment system
See also:
Fuel grade
You should only refuel with unleaded premium-grade gasoline as this avoids
damaging the catalytic converter.
If engine running problems are apparent, have the cause checked immediately and
rep ...
Adjusting the four-way lumbarsupport
You can adjust the contour of the driver's seat
backrests individually to provide optimum
support for your back.
1 To raise the backrest contour
2 To soften the backrest contour
3 To lower the ...
Adjusting the seats
Vehicles without Memory function: the seats can be adjusted within three minutes
of a front door being opened.
The time period starts over again if, within these three minutes, you:
open or ...