
Problems with the engine
Problem Possible causes/consequences and M Solutions
The engine does not
start.
The starter motor can
be heard.
There is air in the fuel system.
X
Turn the key back to position 0 in the ignition lock before
attempting to start the engine again.
X
Start the engine again.
Please bear in mind that lengthy and frequent starting attempts
will drain the battery.
If the engine does not start after several attempts:
X
Consult a qualified specialist workshop.
The engine does not
start.
The starter motor can
be heard. The reserve
fuel warning lamp is lit
and the fuel gage is at
0.
The fuel tank has been run dry.
X
Refuel the vehicle.
If you drive until the fuel tank is completely empty, air may get into
the fuel system. If the engine does not start after refueling, bleed
the fuel system as follows:
X
Turn the key to position 2 in the ignition for approximately
10 seconds.
X
Start the engine continuously for a maximum of 60 seconds.
If the engine does not start:
X
Wait approximately 2minutes.
X
Start the engine continuously for a maximum of 60 seconds
again.
X
If the engine still fails start, do not continue trying to start it.
X
Consult a qualified specialist workshop.
The engine does not
start.
The starter motor
cannot be heard. The
yellow ; engine
diagnostic lamp and
the yellow å DEF
indicator lamp
1
light
up.
The exhaust gas aftertreatmentis faulty, an emission-relevant
malfunction has occurred or the DEF reserve has been used up.
The engine management prevents the engine from starting.
This malfunction or defect can damage the exhaust gas
aftertreatment.
X
Observe the messages in the display:
R
on vehicles without steering-wheel buttons (Y page 195)
R
on vehicles with steering-wheel buttons (Y page 204) and
(Y page 204).
The engine does not
start.
The starter motor
cannot be heard.
The battery isolating switch is switched off.
X
Switch on the power supply (Y page 132).
1
Only vehicles without steering-wheel buttons.
Driving
137
Driving and parking
Z
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