F 53 26
AdBlue
®
/ DEF tank - tank cover
Clean tank cover
m
Impurities or crystals of AdBlue® / DEF
on the outside and inside of the tank cov-
er can considerably interfere with
the system!
A
If the tank cover is visibly soiled, it must
be cleaned as follows.
- Remove the drain plug (A) to empty
the tank.
Collect the remaining contents in a
suitable container and then dispose of
them properly.
- To remove the filler neck filter (B), turn
the filter a quarter of a turn counter-
clockwise and pull out of the filler
neck strainer.
m
To avoid damage, do not use a sharp
object to remove the filler neck filter.
- Remove the filler neck filter.
A
To avoid soiling, place the strainer and
filter on a dry, clean surface.