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:
Stowage well under the trunk floor
(Sedan)
The TIREFIT kit, the vehicle tool kit, etc. are
located in the stowage compartment.
•► To open: pull handle 1 upwards
•► Hook handle 1 into rain trough 2.
! Unhook the handle befo ...
Operating audio player or audio media
Audio data from various audio devices or
media can be played, depending on the
equipment installed in the vehicle.
► Switch on COMAND and select the audio
device or medium (see the separat ...
Brake fluid level
If you notice that the brake
fluid level in
the brake fluid reservoir has fallen to the
MIN mark or less, check the brake system
immediately for leaks. Also check the
thickness of the brake ...