General notes
G
WARNING
If maintenance and repair work is carried out
on the engine incorrectly, this can cause
engine failure. Engine failure can lead to an
increased risk of accidents.
Maintenance and repair work on the engine
may only be carried out by personnel who
have undergone the appropriate training.
Always have work on or modifications to the
engine carried out at a qualified specialist
workshop
which
has the necessary specialist
skills and tools for the work required.
Mercedes-Benz recommends that you use a
Mercedes-Benz or MTU Service Centre for
this purpose.
Apart from careful operation and mainte-
nance of the engine it is also important that
malfunctions be rectified in good time.
You can rectify certain malfunctions yourself
(Y page 89).
Have malfunctions that you cannot eliminate
yourself rectified at a qualified specialist
workshop.
Mercedes-Benz recommends that you go to a
Mercedes-Benz or MTU Service Centre, as
they have the necessary knowledge and tools
to carry out the required work (Y page 11). In
particular, work relevant to safety or on
safety-related systems must be carried out at
a qualified specialist workshop.
Bleeding the fuel system
Fuel system without fuel prefilter
Automatic bleeding
!
Do not
bleed the fuel system by operating
the starter motor for an extended period of
time. You could otherwise damage the
starter motor.
X
Turn the starter motor for up to 30 seconds
without
interruption
until the engine is run-
ning smoothly.
The fuel system is automatically bled when
the tank is empty (Y page 35).
Fuel system with fuel prefilter
Fuel prefilter overview
Example: fuel prefilter
:
Fuel hand pump
;
Vent valve
=
Shutoff valve
?
Filter housing
A
Water separator with inspection window
B
Water release valve
If water has collected in inspection window
A, drain the fuel prefilter before bleeding.
86
Bleeding the fuel system
Breakdown assistance
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