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 2 minutes.
X
Restart the engine continuously for a maximum of 60 seconds.
X
If the engine still fails to start, do not continue trying to start it.
X
Consult a qualified specialist workshop.
The vehicle cannot be
driven at a speed
exceeding 5 mph
(8 km/h).
The yellow ; Check
Engine lamp and the yel-
low å DEF indicator
lamp
2
light up.
The exhaust gas aftertreatment system is defective or an emissions-
relevant malfunction has occurred.
This malfunction or defect can damage the exhaust gas aftertreat-
ment.
X
Observe the messages in the display:
R
on vehicles without steering-wheel buttons (Y page 178)
R
on vehicles with steering wheel buttons (Y page 187).
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 118).
2
Only vehicles without steering-wheel buttons.
Driving
123
Driving and parking
Z
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