Mercedes-Benz C-CLASS Operator's Manual page 144

Driving
142
Problem
The engine does not
start. The starter motor
can be heard.
The engine does not
start. The starter motor
can be heard. The
reserve fuel warning
lamp is lit and the fuel
gauge display is at the
reserve level.
The engine does not
start. You cannot hear
the starter motor.
Vehicles with a gasoline
engine:
The engine is not running
smoothly and is misfir-
ing.
The coolant temperature
gauge shows a value
above 248 ‡ (120 †).
Possible causes/consequences and M Solutions
There is a malfunction in the engine electronics.
R
There is a malfunction in the fuel supply.
R
Before attempting to start the engine again:
Turn the SmartKey back to position 0 in the ignition lock.
X
or
Press the Start/Stop button repeatedly until all indicator lamps in
X
the instrument cluster go out.
Try to start the engine again (
X
and frequent attempts to start the engine as these will drain the
battery.
If the engine does not start after several attempts:
Consult a qualified specialist workshop.
X
The fuel tank is empty.
Refuel the vehicle.
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.
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 converter
and damage it.
Have the cause rectified immediately at a qualified specialist work-
X
shop.
The coolant level is too low. The coolant is too hot and the engine is no
longer being cooled sufficiently.
Stop as soon as possible and allow the engine and the coolant to
X
cool down.
Check the coolant level (
X
as you do so and add coolant if necessary.
page 137). Avoid excessively long
Y
page 319).
Y
page 137).
Y
page 300). Observe the warning notes
Y