Replacing The Fuel Filter - Mercedes-Benz OM 904-926 LA BlueTec Operating Instructions Manual

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Start the engine and bleed the fuel system.
Run the engine for approximately 1 minute.
The fuel system bleeds automatically.
If the engine stalls or does not start, bleed
the fuel system manually (
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Check the fuel prefilter with water separa-
tor for leaks while the engine is running.
Replacing the fuel filter element
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WARNING
There is an increased risk of fire when han-
dling fuels as they are highly flammable. Avoid
fire, naked flames and sparks, and refrain
from smoking when handling fuels.
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Environmental note
Dispose of used filter elements, seals and fuel
residue in accordance with relevant local reg-
ulations.
H
Environmental note
If the diesel fuel level (fuel tank) is above
engine height, the feed line must be blocked
off during filter replacement. Otherwise, die-
sel can drain out.
Example: OM 926 LA
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Y page 86).
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Replacing the AdBlue
G
If the AdBlue
temperatures, ammonia vapours may escape.
Work schedules
Clean the outside of the filter housing.
Open the fuel filler cap to prevent excess
pressure in the fuel tank.
Unscrew fuel filter cap : using a socket
spanner insert (SW 36).
Pull fuel filter cap : with filter element
= out of the filter housing slightly. Allow
the fuel to drain off.
Remove the cap and filter element. Unclip
the filter element by pressing the sides of
the lower edge of the filter element.
Make sure that no foreign objects enter
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the filter housing.
Never wipe inside the filter housing.
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The ingress of water must be prevented.
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Replace sealing ring ; with a new one
(grease lightly).
Clip new filter element = into housing
cover :.
Screw on and tighten oil filter cap : with
filter element = (tightening torque:
25 Nm).
Put on the fuel filler cap and tighten it.
Start the engine and bleed the fuel system
( Y page 86).
Run the engine for approximately 1 minute.
The fuel system bleeds automatically.
If the engine stalls or does not start, bleed
the fuel system manually.
Check the fuel filter for leaks with the
engine running.
WARNING
®
/DEF tank cap is opened at high
®
/DEF filter
Z
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