MTU 12V4000G34F Operating Instructions Manual page 161

9.8.7 Fuel prefilter – Filter element replacement
Note: The descriptions also apply to heavy-duty fuel prefilters
Fuel prefilter (non-switchable)
u
Fuel prefilter, replace filter element (→ Page 165).
Fuel prefilter (switchable)
u
Fuel prefilter, replace filter element (→ Page 162).
MS15060/01E 2018-12 | Fuel Filter | 161