Mercedes-Benz C 250 Coupe, Operator'S Manual

Page: 131 / 336

Problems with the engine
Problem Possible causes/consequences and
M
Solutions
The engine does not
start. The starter motor
can be heard.
R
There is a malfunction in the engine electronics.
R
There is a malfunction in the fuel supply.
X
Before attempting to start the engine again, turn the SmartKey
in the ignition back to position
0 or press the Start/Stop button
repeatedly until all indicator lamps in the instrument cluster go
out.
X
Try to start the engine again (
Y
page 126). Avoid excessively
long and frequent attempts to start the engine as these will drain
the battery.
If the engine does not start after several attempts:
X
Consult a qualified specialist workshop, e.g. an authorized
Mercedes-Benz Center.
The engine does not
start. You cannot hear
the starter motor. The on-board voltage is too low because the battery is too weak
or discharged.
X
Jump-start the vehicle (
Y
page 287).
If the engine does not start despite attempts to jump-start it:
X
Consult a qualified specialist workshop, e.g. an authorized
Mercedes-Benz Center.
The starter motor was exposed to a thermal load that was too high.
X
Allow the starter motor to cool down for approximately two
minutes.
X
Try to start the engine again.
If the engine still does not start:
X
Consult a qualified specialist workshop, e.g. an authorized
Mercedes-Benz Center.
Driving
129
Driving and parking
Z