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Keep pressing the hand pump
#
trol unit
2
(about 100‑times) until the over‐
flow valve audibly opens.
Within about five seconds, press the external
#
engine start/stop (
page 343) and start
/
the engine.
If the engine starts: let the engine run with
#
increased engine speed.
If the engine does not start: repeat the proce‐
#
dure.
Tilt the cab back to drive position
#
(
page 339).
/
Screw on the fuel tank fuel filler cap.
#
Fit the cover.
#
Bleeding the fuel system without fuel prefil‐
ter (OM 470/471/473)
Apply the parking brake.
#
Switch on the ignition.
#
Shift the transmission to neutral position.
#
Tilt the cab forward (
/
#
Unscrew the fuel tank fuel filler cap.
#
Unscrew screws 2.
#
Remove the cover 1.
#
1
at the con‐
If fuel pressure has been established at the hand
pump 3, the engine must be started within
about five seconds. Otherwise the fuel pressure
drops and the process must be repeated.
#
page 339).
#
#
#
#
#
#
Bleeding the fuel system without fuel prefil‐
ter (OM 936)
#
%
#
#
Breakdown assistance 345
Press the handle of the hand pump
main filter until a noticeable resistance can
be felt.
Within about five seconds, press the external
engine start/stop (
page 343) and start
/
the engine.
If the engine starts: let the engine run with
increased engine speed.
If the engine does not start: repeat the proce‐
dure.
Tilt the cab back to drive position
(
page 339).
/
Screw on the fuel tank fuel filler cap.
Fit the cover 2.
Press and hold the Start/Stop button as far
as it will go or turn and hold the key in the
ignition lock to the start position. Do not
depress the accelerator pedal while doing so.
The starting procedure will be automatically
interrupted after about 60 seconds.
If the engine fires regularly, release the Start/
Stop button or release the key in the ignition
lock and depress the accelerator pedal sev‐
eral times.
The fuel system bleeds completely.
If the engine does not start, press and hold
the Start/Stop button again as far as it will go
or turn and hold the key in the ignition lock to
the start position.
3
on the
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