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:
Driving systems
Problem
Possible causes/consequences and
Solutions
The red
distance
warning lamp lights up
while the vehicle is in
motion. A warning tone
also sounds.
R ...
Snow chains
For safety reasons, Mercedes-Benz
recommends that you only use snow chains
which have been specially approved for your
vehicle by Mercedes-Benz, or are of a
corresponding standard of quality.
...
Important safety notes
In the following section, the term "sliding sunroof" refers to the panorama roof
with power tilt/sliding panel.
WARNING
When opening or closing the sliding sunroof, make sure that t ...