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Driving
150
Problems with the engine
Problem
The engine does not
start.
The engine does not
start. The starter motor
can be heard.
The engine does not
start. You cannot hear
the starter motor.
Vehicles with a petrol
engine:
The engine is not run-
ning smoothly and is
misfiring.
Possible causes/consequences and M M Solutions
The HOLD function or DISTRONIC PLUS is activated.
Deactivate the HOLD function (
X
PLUS (
page 171).
Y
Try to start the engine again.
X
There is a malfunction in the engine electronics.
R
There is a malfunction in the fuel supply.
R
Turn the key back to position 0 in the ignition lock before
X
attempting to start the engine again.
or
Press the Start/Stop button repeatedly until all indicator lamps
X
in the instrument cluster go out.
Try to start the engine again (
X
long and frequent attempts to start the engine, as this will drain
the battery.
If the engine does not start after several attempts:
Consult a qualified specialist workshop.
X
The on-board voltage is too low because the battery is too weak or
discharged.
Jump-start the vehicle (
X
If the engine does not start despite attempts to jump-start it:
Consult a qualified specialist workshop.
X
The starter motor was exposed to a thermal load that was too high.
Allow the starter motor to cool down for approximately two
X
minutes.
Try to start the engine again.
X
If the engine still does not start:
Consult a qualified specialist workshop.
X
There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.
Only depress the accelerator pedal slightly.
X
Otherwise, non-combusted fuel may get into the catalytic con-
verter and damage it.
Have the cause rectified immediately at a qualified specialist
X
workshop.
page 183) or DISTRONIC
Y
page 143). Avoid excessively
Y
page 304).
Y
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