Mercedes-Benz R-Class Owner's Manual page 293

Practical advice
Troubleshooting
Engine
Problem
The engine will not start. You can
hear the starter motor operating.
The engine will not start. You can
hear the starter motor operating.
The reserve fuel warning lamp is
on and the fuel gauge shows 0.
The engine will not start. You can-
not hear the starter motor oper-
ating.
290
Possible cause/consequence
There is a malfunction in the
R
engine electronics.
There is a malfunction in the
R
fuel supply.
The fuel tank has been run dry.
The on-board voltage is too low
because the starter battery is too
weak or discharged.
The starter motor was exposed to
a thermal load that was too high.
Suggested solutions
Turn the key back to position 0 (
X
before the next starting attempt.
Try to start the engine again (
X
ber that excessively long and frequent attempts to start the engine
will drain the battery.
If the engine does not start after several attempts:
Consult a qualified specialist workshop.
X
Refuel the vehicle.
X
Bleed the fuel system ( page 289).
X
Y
Jump-start the vehicle ( page 329).
X
Y
If the engine does not start despite attempting to jump-start it:
Consult a qualified specialist workshop.
X
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 76)in the ignition lock
Y
page 110). When doing so, remem-
Y