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:
Displaying service messages
Switch on the ignition.
Press or
on the steering wheel to select
the Serv. menu.
Press or
to select the ASSYST PLUS submenu
and press to confirm. The service
due date appears ...
Redialing
The on-board computer saves the last names
or numbers dialed in the redial memory.
– Press the or
button on the
steering wheel to select the Tel menu.
– Press the button to switch to the
r ...
Cleaning the display
Before cleaning the display, make sure that
it is switched off and has cooled down.
Clean the display surface using a
commercially-available microfiber cloth
and TFT/LCD display cleaner.
Dr ...