Mercedes-Benz 2011 M-Class Operator's Manual page 157

Problems with the fuel and fuel tank
Problem
Fuel is leaking from the
vehicle.
The fuel filler flap
cannot be opened.
The fuel tank in a diesel
engine vehicle has
been run completely
dry and the engine will
not start.
Possible causes/consequences and M Solutions
G
Risk of explosion or fire
The fuel line or fuel tank is defective.
X
Turn the SmartKey to position 0(
immediately and remove it.
X
Do not restart the engine under any circumstances.
X
Consult a qualified specialist workshop.
The fuel filler flap is not released.
or
The SmartKey batteries are discharged.
X
Unlock the vehicle using the mechanical key (
X
Open the tailgate.
X
Manually unlock the fuel filler flap using the emergency release
Y
( page 153).
The fuel filler flap is released, but the opening mechanism is
jammed.
X
Manually unlock the fuel filler flap using the emergency release
( Y page 153).
X
Consult a qualified specialist workshop.
There is air in the fuel system.
X
Refuel the vehicle with at least 5.3 US qt (5 liters) of diesel.
X
Turn the ignition on for at least 10 seconds. Turn the SmartKey
to position 2( Y page 139) in the ignition lock.
X
Start the engine continuously for up to 10 seconds until it runs
smoothly.
If the engine does not start:
X
Turn the ignition on again for approximately 10 seconds. Turn
the SmartKey to position 2(
X
Start the engine again continuously for up to 10 seconds until
it runs smoothly.
If the engine does not start after three attempts:
X
Consult a qualified specialist workshop.
Y page 139) in the ignition lock
Y page 75).
Y
page 139) in the ignition lock.
Refueling
155
Z