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:
Call priority
When service calls are active, e.g. Roadside Assistance or MB Info calls, an
emergency call can still be initiated. In this case, an emergency call will take
priority and override all other active ...
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 Serv. menu.
If th ...
Vehicle
Display messages
Possible causes/consequences and
Solutions
You have attempted to start the engine with the transmission in
position R or D.
– Shift the transmiss ...