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:
Switching the rear window wiper on/off
Combination switch
1 Rear window wiper switch
2 To wipe with washer fluid
3 To switch on intermittent
wiping
4 To switch off intermittent
wiping
5 To wipe with washer fluid
– Turn the ...
Cleaning the headliner and carpets
– Headliner: use a soft brush or a cleaning
agent recommended and approved by
Mercedes-Benz to remove heavy soiling.
– Carpets: use the carpet and textile
cleaning agents recommended and
appr ...
Engine emergency off
If the engine cannot be switched off as
described, observe the following procedure:
► Take the fuse allocation chart out of the
vehicle tool kit.
► Search for fuse 120 in the fuse al ...