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:
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 displ ...
DEF
Important safety notes
For BlueTEC vehicles only.
DEF is a non-flammable, non-toxic, colorless,
odorless and water-soluble fluid.
Rinse surfaces that have come into
contact with DEF immediately ...
Speedometer with segments
The segments in the speedometer indicate
which speed range is available.
Cruise control activated:
The segments light up from the stored speed to the maximum speed.
DISTRONIC PLUS activated:
One ...