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:
Tire pressure monitor warning messages
If the tire pressure monitor detects a
significant pressure loss on one or more tires,
a warning message is shown in the
multifunction display. A warning tone also
sounds and the tire pressure ...
Important notes on tire pressure
WARNING
Should the tire pressure drop repeatedly:
- check the tire for foreign bodies.
- check whether the wheel is losing air or the
valve is leaking.
- make sure that only a valve cap approve ...
COMAND controller
You can use the COMAND controller to select
the menu items in the COMAND display.
You can call up menus or lists, scroll through
menus or lists and exit menus or lists.
The COMAND controller c ...