Mercedes-Benz CLS 2015 Operator's Manual page 158

Driving
156
Problems with the engine
Problem
The engine does not
start. The starter motor
can be heard.
The engine does not
start. You cannot hear
the starter motor.
Possible causes/consequences and M 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 key back to position 0 in the ignition lock.
X
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 these 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
page 151). Avoid excessively
Y
page 335).
Y