Mercedes-Benz GL-Class: Refueling
Fuel filler flap
The fuel filler flap is unlocked or locked automatically when you open or close the vehicle with the SmartKey or using KEYLESSGO.
The position of the fuel filler cap is displayed
in the instrument cluster 
. The arrow
next to the filling pump indicates the side of
the vehicle.
1 To open the fuel filler flap
2 To insert the fuel filler cap
3 Fuel type
4 Tire pressure table
Opening
► Switch off the engine.
► Remove the SmartKey from the ignition
lock.
KEYLESS-GO: open the driver’s door. This switches the ignition to position 0, which corresponds to having removed the SmartKey. The driver’s door can be closed again.
► Press the fuel filler flap in the direction of arrow 1.
The fuel filler flap opens slightly.
► Open the fuel filler flap.
► Turn the fuel filler cap counter-clockwise
and remove it.
► Insert the fuel filler cap into the holder
bracket on the inside of filler flap ;.
► Completely insert the pump nozzle into the
filler neck and refuel.
► Only fill the tank until the pump nozzle
switches off.
Overfilling the fuel tank could damage the
fuel system.
Closing
► Replace the fuel filler cap and turn it
clockwise. The fuel filler cap audibly
engages.
► Close the fuel filler flap.
If you drive with the fuel filler cap open,
the reserve fuel warning lamp flashes. In
addition, the 
(USA only) or
(Canada only) Check Engine warning
lamp
may light up. A message appears in the
multifunction display.
For further information on warning and indicator lamps in the instrument cluster, see.
Close the fuel filler flap before locking the
vehicle. A locking pin otherwise prevents
the fuel filler flap from closing after the
vehicle has been locked.
Diesel
Fuel grade
Only refuel with ULTRA-LOW SULFUR
DIESEL FUEL (ULSD, 15 ppm SULFUR
MAXIMUM). Using other diesel fuels could
result in increased wear and damage to the
engine and/or exhaust system.
...
Fuel filler flap emergency release
WARNING
Avoid contact with the vehicle walls as they
may contain sharp edges. Otherwise, you
could injure yourself while releasing the fuel
filler flap.
The emergency release is locat ...
See also:
Using this Manual
To quickly locate information about the vehicle, use the Index in the back of
the manual. It is an alphabetical list of what is in the manual and the page number
where it can be found. ...
Vehicle Identification Number (VIN)
This legal identifier is in the front corner of the instrument panel, on the
left side of the vehicle. It can be seen through the windshield from outside. The
VIN also appears on the Vehicle Cer ...
Stowage compartments
Important safety notes
WARNING
To help avoid personal injury during a collision
or sudden maneuver, exercise care when
storing objects in the vehicle. Put luggage or
cargo in the carg ...
