Mercedes-Benz S-Class Operator's Manual page 322

Refueling
320
Problems with fuel and the fuel tank
Problem
Fuel is leaking from the
vehicle.
The fuel filler flap
cannot be opened.
The engine will not
start.
Possible causes/consequences and M Solutions
G
Risk of explosion or fire
The fuel line or the 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 unlocked.
or
The SmartKey battery is discharged.
X
Unlock the vehicle (
or
X
Unlock the vehicle using the mechanical key (
The fuel filler flap is unlocked, but the opening mechanism is
jammed.
X
Consult a qualified specialist workshop.
The fuel tank of a vehicle with a diesel engine has been run
completely dry.
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 (
X
Start the engine continuously for up to 10 seconds until it runs
smoothly.
or
X
Start the engine via the touch-start function. To do this, turn the
SmartKey to position 3 (
then release it immediately.
If the engine does not start:
X
Turn the ignition on again for approximately 10 seconds
( Y page 303).
X
Start the engine again continuously for up to 10 seconds until
it runs smoothly.
or
X
Start the engine again via the touch-start function.
If the engine does not start after three attempts:
X
Consult a qualified specialist workshop.
I n f o r ma t i o n P r o v i d e d b y :
Y page 303) in the ignition lock
Y page 78).
Y page 303) in the ignition lock and
Y page 81).
Y page 303).