20 seconds and, if necessary, repeat after
approximately one minute. After three start-
ing procedures wait for approximately three
minutes.
X
Once the engine starts normally, release the
Start/Stop button or the key in the ignition
lock and depress the accelerator pedal sev-
eral times.
The fuel system is completely bled.
X
Vehicles with OM 936: if the engine does not
start, press and hold the Start/Stop button
again as far as it will go, or turn the key to the
start position in the ignition lock and hold it.
Air regulation system
Function
H
Environmental note
If the air regulation system is malfunctioning,
fuel consumption may increase.
The air regulation system controls the air supply
to the engine radiator. If the slats are open, a
high volume of air flows through the engine radi-
ator and the coolant is cooled with maximum
efficiency. If the slats are closed, less air flows
through the engine radiator and the coolant
heats up more quickly.
If the air regulation system is malfunctioning
and foreign objects/dirt are not the cause of the
issue, you must manually open and lock the
affected air regulation system. Open the upper
and lower air regulation system and lock them
before you drive on. Have the air regulation sys-
tem repaired as soon as possible at a qualified
specialist workshop.
Upper air regulation system
Upper air regulation system (example: Actros)
:
Step
1
Released
2
Engaged
X
To open and lock: stop the vehicle and apply
the parking brake.
X
Switch off the engine.
X
Switch the ignition lock to position 0.
X
Fold down access step : beside the left
headlamp.
X
To open the slats of the upper air regulation
system, carefully fold down one of the middle
slats.
X
Turn the lock of the upper air regulation sys-
tem clockwise to position 2.
Lower air regulation system
Lower air regulation system (example: Actros, left)
Engine
379
Breakdown assistance
Z
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