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:
Glare from the side
– Fold down sun visor 1.
– Pull sun visor 1 out of retainer 3.
– Swing sun visor 1 to the side.
– Slide sun visor 1 forwards and back as required.
– Fold down additional sun visor 2. ...
Initiating point of interest entry
To activate navigation mode: press the
function button once or twice.
To show the menu: press
the COMAND
controller.
Select Destination in the navigation
system menu bar by turning
...
Activating/deactivating airrecirculation mode
You can deactivate the flow of fresh air if unpleasant odors are entering the
vehicle from outside. The air already inside the vehicle will then be recirculated.
WARNING
Fogged windows impair ...