Mercedes-Benz 2011 GL-Class Operator's Manual page 164

Refueling
162
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 161).
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 161).
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 147) 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 147) in the ignition lock
Y page 75).
Y page 147) in the ignition lock.