F 53 32
Cleaning and checking for reusability
- Check the thread of the DEF dosing
unit. This is particularly important if the
cover of the DEF dosing unit was de-
fective. If the thread of the DEF dosing
unit is damaged, replace the complete
DEF dosing unit. Check that the
groove of the anti-freeze membrane is
clean and free of soiling. Clean with a
clean, damp cloth, warm water and a
mild cleaner.
A
Never drive the vehicle when the DEF fil-
ter or filter housing is removed. Clean
the cover of the new filter housing of the
DEF dosing unit and the thread of the
dosing unit. Use warm water and a
clean cloth.