2012 MERCEDES-BENZ G-Class fuel

Warning and indicator lamps
Function Page
:
Low-beam headlamps 89
;
ESP
®
OFF 182
=
ESP
® 182
?
Turn signal 91
A
ABS 181
B
Seat belt 178
C
SRS 183
D
Check Engine (Canada
only)
184 Function Page
E
Check Engine (USA only) 184
F
Reserve fuel 184
G
High-beam headlamps 91
H
Tire pressure monitor 185
I
Brakes (USA only) 180
J
Brakes (Canada only) 18026
Instrument clusterAt a glance

2. This device must accept any interference
received, including interference that may
cause undesired operation.
Any unauthorized modification to this
device could void the user’s authority to
operate the equipment.
i Canada only:
This device complies with RSS-210 of
Industry Canada. Operation is subject to
the following two conditions:
1. This device may not cause interference,
and
2. this
device must accept any interference
received, including interference that may
cause undesired operation of the device.
Any unauthorized modification to this
device could void the user’s authority to
operate the equipment.
Locking and unlocking centrally The SmartKey centrally locks/unlocks:
R
the doors
R the rear door
R the fuel filler flap :
& To lock the vehicle
; % To unlock the vehicle
When unlocking, the turn signals flash once.
When locking, they flash three times.
X To unlock centrally: press the %
button. If you do not open a door or the tailgate within
approximately 40 seconds of unlocking the
vehicle:
R
the vehicle is locked again.
R the theft
deterrent locking system is armed
again.
X To lock centrally: press the & button. Changing the settings of the locking
system
You can change the setting of the locking
system in such a way that only the driver's
door and

the fuel filler flap are unlocked. This
is useful if you frequently travel on your own.
X To change the setting: press and hold
down the % and & buttons
simultaneously for approximately six
seconds until battery check lamp flashes
twice.
The SmartKey now functions as follows:
X To unlock the driver's door and fuel
filler flap: press the % button once.
X To unlock centrally: press the %
button twice.
X To lock centrally: press the & button. Restoring the factory settings
X Press the % and & buttons
simultaneously for approximately six
seconds until the battery check lamp
flashes twice. Mechanical key
General notes If the vehicle can no longer be unlocked with
the SmartKey, use the mechanical key.
If you use the mechanical key to unlock and
open the driver's door or the trunk lid, the SmartKey
61
Opening/closing Z

Doors
Important safety notes
G
WARNING
When leaving the vehicle, always remove the
SmartKey from the ignition lock. Always take
the SmartKey with you and lock the vehicle.
Do not leave children unsupervised in the
vehicle, even if they are secured in a child
restraint system,
and do not give them access
to an unlocked vehicle. A child's unsupervised
access to a vehicle could result in an accident
and/or serious personal injury. They could:
R injure themselves on vehicle parts
R be seriously or fatally injured by extreme
heat or cold
R injure themselves or have an accident with
vehicle equipment that may still be in
operation even after the SmartKey has
been removed from the ignition, such as the
seat adjustment, steering wheel
adjustment or memory function.
If children open a door, they could cause
severe or even fatal injury to other persons; if
they get out of the vehicle, they could injure
themselves when doing so or be seriously or
even fatally injured by any passing traffic.
Do not expose the child restraint system to
direct sunlight. The child restraint system's
metal parts, for example, could become very
hot, and a child could be burned on these
parts. G
WARNING
Do not carry heavy or hard objects in the
passenger compartment or cargo
compartment unless they are firmly secured
in place.
Unsecured or improperly positioned cargo
increases a child's risk of injury in the event
of
R strong braking maneuvers
R sudden changes of direction
R an accident Unlocking and opening doors from
inside
You can

open a door anytime from inside the
vehicle even if it has been locked, unless the
child-proof locks (Y page 52) have been
activated.
If the vehicle has previously been locked with
the SmartKey, opening a door from the inside
will trigger the anti-theft alarm system.
Switch off the alarm (Y page 57). X
Front doors:
pull door handle
;.
If the

door is locked, locking knob : pops
up. The door is unlocked and can be
opened.
X Rear doors: pull

locking knob : upwards.
The door is unlocked.
X Pull door handle ;. Centrally locking and unlocking the
vehicle from the inside
You can centrally lock or unlock the vehicle
from the

inside. This feature may be useful if,
for example, you wish to unlock the front-
passenger door from the inside or lock the
vehicle before you pull away.
The central locking button does not lock or
unlock the fuel filler flap.
i You cannot unlock the vehicle centrally
from the inside if the vehicle has been
locked from the outside using the
SmartKey. Doors
65
Opening/closing Z

X
Take mechanical key ; out of the
SmartKey (Y page 61).
X Insert mechanical key ; into the lock of
the driver's door as far as it will go.
X Turn mechanical key ; clockwise
as far as
it will go to position 1.
X Turn the mechanical key back and remove
it.
X Make sure that the doors and the tailgate
are locked.
i If you

lock the vehicle as described above,
the fuel filler flap is not locked. The anti-
theft alarm system is not armed. Cargo compartment
Important safety notes
Do not leave the SmartKey in the cargo
compartment. Otherwise, you could lock
yourself out. G
WARNING
When leaving the vehicle, always remove the
SmartKey from the ignition lock. Always take
the SmartKey with you and lock the vehicle.
Do not leave children unsupervised in the
vehicle, even if they are secured in a child
restraint system,

and do not give them access
to an unlocked vehicle. A child's unsupervised
access to a vehicle could result in an accident
and/or serious personal injury. They could:
R injure themselves on vehicle parts
R be seriously or fatally injured by extreme
heat or cold
R injure themselves or have an accident with
vehicle equipment that may still be in
operation even after the SmartKey has
been removed from the ignition, such as the
seat adjustment, steering wheel
adjustment or memory function.
If children open a door, they could cause
severe or even fatal injury to other persons; if
they get out of the vehicle, they could injure
themselves when doing so or be seriously or
even fatally injured by any passing traffic.
Do not expose the child restraint system to
direct sunlight. The child restraint system's
metal parts, for example, could become very
hot, and a child could be burned on these
parts. G
WARNING
Do not carry heavy or hard objects in the
passenger compartment or cargo
compartment unless they are firmly secured
in place.
Unsecured or improperly positioned cargo
increases a child's risk of injury in the event
of
R strong braking maneuvers
R sudden changes of direction
R an accident Cargo compartment
67
Opening/closing Z

Useful information ............................
114
Breaking-in notes .............................. 114
Driving ............................................... 114
Automatic transmission ................... 119
Refueling ............................................ 124
Parking ............................................... 127
Driving tips ........................................ 129
Driving systems ................................ 139
Off-road driving systems ..................145 113Driving and parking

Problems with the engine
Problem Possible causes/consequences and
M Solutions
The engine does not
start.
The

starter motor
can be heard. R
There is a malfunction in the engine electronics.
R There is a malfunction in the fuel supply.
X Turn
the SmartKey back to position
0
in
the ignition lock before
attempting to start the engine again.
X Try to start the engine again (Y page 115). Avoid excessively
long and

frequent attempts to start the engine as these will drain
the battery.
If the engine does not start after several attempts:
X Consult a qualified specialist workshop. The engine does not
start.
The

starter motor
can be heard. The
yellow reserve fuel
warning lamp is on. The
fuel gauge needle is
pointing to the reserve
range and does not
drop any further. The fuel tank is empty.
X
Refuel the vehicle. The engine does not
start. You cannot hear
the starter motor. The on-board voltage is too low because the battery is too weak
or discharged.
X
Jump-start the vehicle (
Y page 233).
If the engine does not start despite attempts to jump-start it:
X Consult a qualified specialist workshop. The starter motor was exposed to a thermal load that was too high.
X Allow the starter motor to cool down for approximately two
minutes.
X Try to start the engine again.
If the engine still does not start:
X Consult a qualified specialist workshop.118
Driving
Driving and parking

Problem Possible causes/consequences and
M SolutionsThe engine is not
running smoothly and
is misfiring. There is a malfunction in the engine electronics or a mechanical
component of the engine management system.
X
Only depress the accelerator pedal slightly.
X Have the cause rectified immediately at a qualified specialist
workshop.
Otherwise, non-combusted fuel may get into the catalytic
converter and damage it. The coolant
temperature gauge
shows a value above
248 ‡
(120 †).
Additionally, a display
message
may appear in
the multifunction
display and a warning
tone may sound. The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
X
Stop as soon as possible and allow the engine and the coolant
to cool down.
X Check the coolant level (Y page 213). Observe the warning
notes as you do so and add coolant if necessary. Automatic transmission
Important safety notes
G
WARNING
It is dangerous to shift the automatic
transmission out of parking position P or
neutral position N if the engine speed is
higher than

idle speed. If your foot is not firmly
on the brake pedal, the vehicle could
accelerate quickly forward or in reverse. You
could lose control of the vehicle and hit
someone or something. Only shift into gear
when the engine is idling normally and when
your right foot is firmly on the brake pedal. G
WARNING
On slippery road surfaces, never downshift in
order to obtain braking action. This could
result in

drive wheel slip and reduced vehicle
control. Your vehicle's ABS will not prevent
this type of loss of control. G
WARNING
Keep in mind that turning off the engine alone
only will

shift the automatic transmission into
neutral position N automatically.
Always shift the automatic transmission into
park position P before turning off the engine.
Otherwise the vehicle could roll away which
could result in an accident and/or serious
personal injury.
i Bear in mind that the power transmission
between the engine and the transmission
is interrupted when the engine is switched
off. Therefore, to prevent the vehicle from
rolling away, shift the automatic
transmission to position P and apply the
parking brake when the engine is switched
off and the vehicle is stationary. Automatic transmission
119
Driving and parking Z

Problems with the automatic transmission
Problem Possible causes/consequences and
M 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
P.
Releasing the parking lock manually
In the

event of a malfunction, it is possible to
release the selector lever lock manually to
move it out of position P, e.g. if you wish to
have the vehicle towed. X
Apply the parking brake.
X Insert a suitable implement :
into the
opening protected by the flap. X
Press implement : downwards and
simultaneously move

the selector lever out
of position P.
X Remove implement :.
The selector

lever can now be moved freely
until it is returned to position P.
i The protective

flap only closes completely
if you briefly press to selector lever towards
D-. 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. 124
Refueling
Driving and parking