Mercedes-Benz S-Class Coupe, Owner'S Manual

Page: 169 / 413

Problems with the engine
Problem
Possible causes/consequences and M 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 key 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 161). Avoid excessively
long and frequent attempts to start the engine, as this 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
gauge display is at the
reserve level.
The fuel tank is empty.
X
Refuel the vehicle.
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 364).
If the engine does not start despite attempts to jump-start it:
X
Consult a qualified specialist workshop.
The starter motor was exposed to a thermal load that was too high.
X
Try to start the engine again.
If the engine still does not start:
X
Consult a qualified specialist workshop.
The engine is not run-
ning smoothly and is
misfiring.
There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.
X
Only depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic con-
verter and damage it.
X
Have the cause rectified immediately at a qualified specialist
workshop.
166
Driving
Driving
and
parking