2.
During engine operation, turn the switchover
level as far as the stop (arrow) to cut out the
filter module to be serviced.
Result:
• Filter module (1) is cut in
• Filter module (2) is cut out
3.
Open threaded vent plug (1) of filter to be
serviced.
4.
Open drain plug (1).
5.
Allow water to drain until fuel emerges.
6.
Close drain plug (2) again.
7.
Drain the second filter on the module to be
serviced, from (→ Step 3).
8.
Close threaded vent plug again.
9.
Vent fuel prefilter (→ Page 226).
218 | Fuel Filter | MS15039/01E 2018-11
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