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:
Vehicle
Display messages
Possible causes/consequences and
Solutions
You have attempted to start the engine with the transmission in
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– Shift the transmiss ...
Important safety notes
WARNING
Do not turn off the engine before the vehicle has come to a complete stop. With
the engine not running, there is no power assistance for the brake and steering
systems. In this case, ...
Notes on driving
• If the vehicle is heavily laden, check the tire
pressures and correct them if necessary.
• When parking your vehicle, make sure that
the tires do not get deformed by the curb
or other obstacl ...