2012 MERCEDES-BENZ G-Class Owner's Manual

Useful information ............................
224
Where will I find...? ........................... 224
Flat tire .............................................. 226
Battery ............................................... 230
Jump-starting .................................... 233
Towing and tow-starting .................. 235
Fuses .................................................. 237 223Breakdown assistance

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please
note that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Please read the information on qualified
specialist workshops (Y page 20). Where will I find...?
First-aid kit
i Check the

expiration date on the first-aid
kit at least once a year. Replace the
contents if necessary, and replace missing
items.
The first-aid kit is located in the stowage
compartment in the front-passenger door. X
Remove first-aid kit
: from the stowage
space. Vehicle tool kit
General notes i
Vehicles are not equipped with the tools
needed to

change a wheel when they leave
the factory, e.g. a jack or lug wrench. Some
tools for changing a wheel are specific to the vehicle. To obtain tools approved for
your vehicle, contact a qualified specialist
workshop.
The vehicle tool kit contains:
R a vehicle tool kit with:
-a fuse extractor
- an Allen key, e.g. to operate the sliding
roof manually in an emergency
- a pump lever for the vehicle jack
- a screwdriver
- a lug wrench
R a jack
Vehicle tool kit The vehicle tool kit is under the cover in the
footwell in front of the rear bench seat.
X
Fold cover
: to the side.
X Pull vehicle tool kit ; out by the tab.
Jack The jack is located under the rear bench seat
on the right-hand side when viewed in the
direction of travel. 224
Where will I find...?
Breakdown assistance

X
Fold the rear bench seat forward
(Y page 191).
X Open cover :.
X Pull bar = upwards and detach from
tab ?.
X Take out jack ;.
! Make sure that, while installing the
vehicle jack, there are no cables on the
holder, in order to avoid them becoming
trapped.
! Make sure that, while installing the
vehicle jack, there are no cables on the
holder, in order to avoid them becoming
trapped. Exterior spare wheel bracket
General notes G
WARNING
If the spare tire is more than 6 years old or is
not the
same model as the regular tires, have
the spare tire replaced with a new tire at the
nearest Mercedes-Benz Center.
Never operate the vehicle with more than one
spare wheel mounted. G
WARNING
G 55 AMG:
Rim and tire sizes are different for the spare
wheel and the normal wheel. With the spare
wheel mounted, handling is impaired. Do not exceed a maximum speed of
50 mph(80 km/h).
The spare wheel is on the outer side of the
rear door.
Removing the cover Stainless-steel spare hub cap
X
Remove the screwdriver from the vehicle
tool kit ( Y page 224).
X Open the lock on cover ring : with
screwdriver = or a similar tool.
X Fold tab ; down. X
Pull cover ring : apart and remove it.
X Pull off cover panel ?. Where will I find...?
225
Breakdown assistance Z

i
When refitting
cover panel ?, make sure
that retainer B engages in recess A.
Removing the spare wheel G
WARNING
Make sure no one is injured when removing
the spare wheel.
Grip wheel from the sides.
Keep hands from beneath the wheel. X
Remove wheel nuts :.
X Remove the spare wheel.
Mounting the wheel After changing a wheel:
X
Repair or replace the damaged wheel as
soon as possible and secure the spare
wheel in place again.
X Secure the damaged wheel on the spare
wheel bracket with wheel nuts :. When
doing so,

make sure that the wheel cannot
come loose. X
When refitting cover panel ?, make sure
that retainer B engages in recess
A(Y page 225).
X Make sure that tab ; is below when
refitting cover ring : (Y page 225).
X For safety reasons, regularly check to
ensure that

the wheel is securely fastened. Flat tire
Preparing the vehicle
X Stop the vehicle as far away as possible
from traffic

on solid, non-slippery and level
ground.
X Switch on the hazard warning lamps.
X Apply the parking brake.
X Bring the front wheels into the straight-
ahead position.
X Move the selector lever to P.
X Switch off the engine.
X Remove the SmartKey from the ignition
lock.
X All occupants must get out of the vehicle.
Make sure

that they are not endangered as
they do so.
X Make sure that no one is near the danger
area while a wheel is being changed.
Anyone who is not directly assisting in the
wheel change should, for example, stand
behind the barrier.
X Get out of the vehicle. Pay attention to
traffic conditions when doing so.
X Close the driver's door. Changing a wheel and mounting the
spare wheel
Important safety notes G
WARNING
If the spare tire is more than 6 years old or is
not the

same model as the regular tires, have226
Flat tire
Breakdown assistance

the spare tire replaced with a new tire at the
nearest Mercedes-Benz Center.
Never
operate
the vehicle with more than one
spare wheel mounted. G
WARNING
G 55 AMG:
Rim and tire sizes are different for the spare
wheel and the normal wheel. With the spare
wheel mounted, handling is impaired.
Do not exceed a maximum speed of
50 mph(80 km/h).
Preparing the vehicle X
Prepare the vehicle as described
(
Y page 226).
G
WARNING
You must remove the spare wheel from the
spare wheel carrier before lifting the vehicle.
Otherwise the vehicle could fall off the jack
and injure you or others.
X Remove the vehicle tool kit and the jack
( Y page 224).
X Remove the spare wheel from the spare
wheel bracket ( Y page 225).
i Vehicles without a spare wheel/
emergency spare wheel are not equipped
with a

tire-change tool kit at the factory. For
more information on which tools are
required to perform a wheel change on your
vehicle e.g. lug wrench or jack, consult an
authorized Mercedes-Benz Center.
Securing the vehicle to prevent it from
rolling away X
Secure
the vehicle to prevent it from rolling
away.
On level ground: place chocks or similar
items under

the front and rear of the wheel that is diagonally opposite to the wheel you
wish to change.
X On downhill gradients: place chocks or
similar items behind both wheels of the
other axle. G
WARNING
Only
jack up the vehicle on level ground or on
slight inclines/declines. The vehicle could
otherwise fall off the jack and injure you or
others.
Raising the vehicle G
WARNING
When jacking up the vehicle, only use the jack
which has been specifically approved by
Mercedes-Benz for your vehicle.
The jack

is designed exclusively for jacking up
the vehicle under the axle housing. Make sure
the jack is positioned correctly under the axle
housing. The jack must always be vertical
when in use, especially on inclines or
declines.
The jack is intended only for lifting the vehicle
briefly for wheel changes. It is not suited for
performing maintenance work under the
vehicle. To help avoid personal injury, use the
jack only to lift the vehicle during a wheel
change.
Never get beneath the vehicle while it is
supported by the jack. Keep hands and feet
away from the area under the lifted vehicle.
Always lower the vehicle onto sufficient
capacity jackstands before working under the
vehicle.
Always firmly engage the parking brake and
block the wheels with wheel chocks or other
sizeable objects before raising the vehicle
with the jack. Do not disengage the parking
brake while the vehicle is raised.
Make sure that the ground on which the
vehicle is standing and where you place the
jack is solid, level and not slippery. If
necessary, use a large underlay. On slippery Flat tire
227
Breakdown assistance
Z

surfaces, such as tiled floors, you should use
a
non-slip
underlay, for example a rubber mat.
Do not use wooden blocks or similar objects
to support the jack. Otherwise the jack may
not be able to achieve its load-bearing
capacity if it is not at its full height.
Never start the engine when the vehicle is
raised.
Also observe the notes on the jack. X
Using lug wrench
:, loosen the bolts on
the wheel

you wish to change by about one
full turn. Do not unscrew the wheel bolts
completely. ;
Notch on pump lever
X Assemble
the pump lever for the jack. It can
be found with the vehicle tool kit
(Y page 224). X
Turn pressure release screw = clockwise
as far as it will go using notch ; on the
pump lever.
Pressure release screw = is closed.
i Never turn pressure release screw = by
more than one to two revolutions.
Otherwise, hydraulic fluid could escape.
! The jack is designed exclusively for
jacking up

the vehicle at the jacking points.
Otherwise, your vehicle could be damaged. X
Place the jack on solid ground.
X Position the jack at the front or rear axle
carrier tubes The jack must always stand
vertically, even on slopes.
Make sure that the jack is placed in the
correct position beneath the axle carrier
tube. The

front or rear axle must fit into the
support on the jack.
X Raise the vehicle by pumping (arrow) until
the tire is a maximum of 1.2 inches (3 cm)
above the ground.228
Flat tire
Breakdown assistance

Removing a wheel
X
Unscrew the wheel bolts.
! Do not place wheel bolts in sand or on a
dirty surface. The bolt and wheel hub
threads could
otherwise be damaged when
you screw them in.
X Remove the wheel.
Mounting a new wheel G
WARNING
Always replace wheel bolts that are damaged
or rusted.
Never apply oil or grease to wheel bolts.
Damaged wheel hub threads should be
repaired immediately. Do not continue to
drive under these circumstances! Contact an
authorized Mercedes-Benz Center or call
Roadside Assistance.
Incorrect wheel

bolts or improperly tightened
wheel bolts can cause the wheel to come off.
This could cause an accident. Make sure to
use the correct wheel bolts. G
WARNING
Only use genuine Mercedes-Benz wheel bolts.
Other wheel bolts may come loose.
Do not tighten the wheel bolts when the
vehicle is

raised. Otherwise, the vehicle could
fall off the jack.
X Clean the wheel and wheel hub contact
surfaces.
! To prevent

damage to the paintwork, hold
the wheel securely against the wheel hub
while screwing in the first wheel bolt.
X Place the wheel on the wheel hub and push
it on.
X Tighten the wheel bolts until they are
finger-tight. Lowering the vehicle X
Open the pressure release screw on the
jack using the pump lever (Y

page 227) by
approximately one turn.
X Lower the vehicle until it is once again
standing firmly on the ground.
X Place the jack to one side. X
Tighten the wheel bolts evenly in a
crosswise pattern in the sequence
indicated ( : to A

). The tightening torque
must be 96 lb-ft (130 Nm). G
WARNING
Have the tightening torque checked after
changing a wheel. The wheels could come
loose if they are not tightened to a torque of
96 lb-ft (130 Nm).
X Disassemble the pump lever.
X Push the jack piston back in and close the
drain plug.
X Use the bolts to secure the faulty wheel to
the spare wheel bracket ( Y page 225).
X Cover the faulty wheel with the tire cover
provided.
X Put the jack and the rest of the vehicle tool
kit away.
X Check the tire pressure and correct it, if
necessary.
A table with the tire pressures for your
vehicle can be found on the B-pillar on the
driver's side. Flat tire
229
Breakdown assistance Z

Battery
Important safety notes
In order for the battery to achieve the
maximum possible
service life, it must always
be sufficiently charged.
! Have the battery checked regularly at a
qualified specialist workshop.
Observe the service intervals in the
Maintenance Booklet or contact a qualified
specialist workshop for more information.
Have the battery charge checked more
frequently if you use the vehicle mainly for
short trips or if you leave it standing idle for
a lengthy period.
Only replace a battery with a battery that has
been recommended by Mercedes-Benz.
Consult a qualified specialist workshop if you
wish to leave your vehicle parked for a long
period of time. G
WARNING
Comply with safety precautions and take
protective measures

when handling batteries. Risk of explosion
Fire, naked flames and
smoking are prohibited
when handling the battery.
Avoid creating sparks.
Battery acid is caustic.
Avoid
contact

with the skin,
eyes or clothing.
Wear suitable protective
clothing, in particular
gloves, an apron and a face
mask.
Immediately rinse acid
splashes off with clean
water. Consult a doctor if
necessary. Wear eye protection.
Keep children away.
Observe this Operator's
Manual.
H
Environmental note Batteries contain dangerous
substances. It is against the
law to dispose of them with
the household rubbish. They
must
be

collected separately
and recycled to protect the
environment. Dispose of batteries in an
environmentally friendly
manner. Return discharged
batteries to a qualified
specialist workshop or to a
special collection point for
used batteries.
G
WARNING
Failure
to follow these instructions can result
in severe injury or death.
Never lean over batteries while connecting.
You might get injured.
Battery fluid contains sulfuric acid. Do not
allow this fluid to come in contact with eyes,
skin or clothing. In case it does, immediately
flush affected area with water and seek
medical help if necessary.
A battery will also produce hydrogen gas,
which is flammable and explosive. Keep
flames or sparks away from battery, avoid
improper connection of jumper cables,
smoking etc. 230
Battery
Breakdown assistance