1990-2018 Mercedes G Class SUV Driving and parking -> Refueling User Manual
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Driving and parking -> Refueling for Your Mercedes G Class SUV Third Generation (1990-2018)

Problems with the automatic transmission
Problem Possible causes/consequences and MM Solutions
The acceleration ability
is deteriorating.
The transmission no
longer changes gear.
The transmission is in emergency mode.
It is only possible to shift into second gear and reverse gear.
X
Stop the vehicle.
X
Shift the transmission to position P.
X
Turn the SmartKey to position 0 in the ignition lock.
X
Wait at least ten seconds before restarting the engine.
X
Shift the transmission to position D or R.
If D is selected, the transmission shifts into second gear; if R is
selected, the transmission shifts into reverse gear.
X
Have the transmission checked at a qualified specialist
workshop immediately.
You hear a warning
tone.
You have:
R
switched off the engine
R
opened the driver's door
R
not moved the selector lever to position P
X
Move the selector lever to position P.
Refueling
Important safety notes
G
WARNING
Gasoline is highly flammable and poisonous.
It burns violently and can cause serious
personal injury.
Never allow sparks, flames or smoking
materials near gasoline.
Turn off the engine before refueling.
Whenever you are around gasoline, avoid
inhaling fumes and any skin or clothing
contact.
Direct skin contact with fuels and the
inhalation of fuel vapors are damaging to your
health.
!
Do not use diesel to refuel vehicles with a
gasoline engine. Even small amounts of the
wrong fuel result in damage to the fuel
system and engine.
!
Do not switch on the ignition if you
accidentally refuel with the wrong fuel.
Otherwise, the fuel will enter the fuel lines.
Notify a qualified specialist workshop and
have the fuel tank and fuel lines drained
completely.
!
Overfilling the fuel tank could damage the
fuel system.
!
Take care not to spill any fuel on painted
surfaces. You could otherwise damage the
paintwork.
!
Use a filter when refueling from a fuel can.
Otherwise, the fuel lines and/or injection
system could be blocked by particles from
the fuel can.
If you overfill the fuel tank, pressure may build
up in the fuel tank. This could cause fuel to
spray out when the fuel pump nozzle is
removed. There is a risk of injury. The fuel
tank is full when the fuel pump nozzle first
switches off. End the refueling process.
Refueling
153
Driving and parking
Z
Further information on fuel and fuel quality
(Y page 343)
Refueling
Vehicles with a fuel filler flap
Example: G 550 fuel filler cap
:
To open the fuel filler flap
;
Tire pressure table
=
Fuel type
?
To insert the fuel filler cap
When you open or close the vehicle with the
SmartKey, the fuel filler flap is automatically
unlocked or locked.
The position of the fuel filler cap is displayed
8 in the instrument cluster. The arrow
next to the filling pump indicates the side of
the vehicle. The fuel filler flap is located to the
rear on the right.
Vehicles without a fuel filler flap
Opening the fuel filler cap
:
To open the fuel filler flap
;
Tire pressure table
=
Fuel type
?
To insert the fuel filler cap
X
Switch the engine off.
i
When the engine is running and the fuel
filler flap is open, the yellow reserve fuel
warning lamp and the = (USA only)
or ; (Canada only) Check Engine
warning lamp may light up.
Further information about warning and
indicator lamps in the instrument cluster
can be found in the Digital Operator's
Manual.
X
Remove the SmartKey from the ignition
lock.
X
Turn the fuel filler cap counterclockwise
and remove it.
X
Insert the fuel filler cap into the holder
bracket on the inside of filler flap ?.
Refueling
X
Completely insert the filler neck of the fuel
pump nozzle into the tank and refuel.
i
Do not add any more fuel after the pump
stops filling for the first time. Otherwise,
fuel may leak out.
154
Refueling
Driving and parking
Closing
X
Replace the fuel filler cap and turn it
clockwise. The fuel filler cap audibly
engages.
X
Close the fuel filler flap.
i
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.
Fuel filler flap emergency release
The emergency release is located in the cargo
compartment, on the right-hand side when
viewed in the direction of travel, behind the
rear panel trim.
i
The vehicle body in the emergency
release area has sharp edges. There is a
risk of injury. Avoid contact with the edges
on the inside of the vehicle body.
X
Open the rear door.
X
Remove edge protection :.
X
Remove rear panel trim ;.
X
Pull emergency release = in the direction
of the arrow.
The fuel filler flap is unlocked.
X
Open the fuel filler flap.
Refueling
155
Driving and parking
Z
Problems with the fuel and fuel tank
Problem Possible causes/consequences and MM Solutions
Fuel is leaking from the
vehicle.
G
Risk of explosion or fire
The fuel line or the fuel tank is defective.
X
Turn the SmartKey to position 0(Y page 139) in the ignition lock
immediately and remove it.
X
Do not restart the engine under any circumstances.
X
Consult a qualified specialist workshop.
The fuel filler flap
cannot be opened.
The fuel filler flap is not unlocked.
or
The SmartKey batteries are discharged.
X
Unlock the vehicle (Y page 68).
or
X
Unlock the vehicle using the mechanical key (Y page 70).
X
Open the rear door.
X
Manually unlock the fuel filler flap using the emergency release
(Y page 155).
The fuel filler flap is unlocked, but the opening mechanism is
jammed.
X
Manually unlock the fuel filler flap using the emergency release
(Y page 155).
X
Consult a qualified specialist workshop.
Parking
Important safety notes
G
WARNING
If you leave children unsupervised in the
vehicle, they could set it in motion by, for
example:
R
release the parking brake.
R
shift the automatic transmission out of the
parking position P.
R
start the engine.
In addition, they may operate vehicle
equipment and become trapped. There is a
risk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
G
WARNING
Flammable material such as leaves, grass or
twigs may ignite if they come into contact with
hot parts of the exhaust system or exhaust
gas flow. There is a risk of fire.
Park the vehicle so that no flammable
materials come into contact with parts of the
vehicle which are hot. Take particular care not
to park on dry grassland or harvested grain
fields.
156
Parking
Driving and parking

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