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:
SmartKey
Display messages
Possible causes/consequences and
Solutions
You have put the wrong SmartKey in the ignition lock.
Use the correct SmartKey.
The SmartKey ...
Activating/deactivating climate
control
Important information
WARNING
When the climate control system is
deactivated, the outside air supply and
circulation are also deactivated. Only choose
this setting for a short time. Otherw ...
Useful information
This Operator's Manual describes all models and all standard and optional equipment
of your vehicle available at the time of publication of the Operator's Manual. Country-specific
diffe ...