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:
System self-test
The indicator lamp illuminates when
you:
turn the SmartKey to position 1 or 2 in the ignition lock
on vehicles with KEYLESS-GO, press the Start/Stop button once or twice
If an adult occupa ...
Radiator
Vehicles with a diesel engine: do not
cover the radiator, for example with a
winter front or bug cover. The readings of
the on-board-diagnostic system may
otherwise be inaccurate. Some of ...
Cleaning the sensors
Clean sensors 1 of the driving systems
with water, car shampoo and a soft cloth.
When cleaning the sensors with a
power
washer, maintain a distance between the
vehicle and the nozzl ...