2012 MERCEDES-BENZ G-Class Wheel change

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

:
Towing eye, rear Towing a vehicle with both axles on
the ground
It is important that you observe the safety
instructions when towing away your vehicle
(Y page 235). G
WARNING
The power assistance for the steering and the
brake force booster do not work when the
engine is not running. You will then need
much more effort to brake and steer the
vehicle. Adapt your style of driving
accordingly.
X Switch on the hazard warning lamps
(Y page 91).
i When towing with the hazard warning
lamps switched on, use the combination
switch as usual to signal a change of
direction. In
this case, only the turn signals
for the desired direction flash. When the
combination switch is reset, the hazard
warning lamps start flashing again.
X Turn the SmartKey to position 2 in the
ignition lock.
X When the vehicle is stationary, depress the
brake pedal and keep it depressed.
X Shift the transfer case to neutral position
N (Y page 145).
X Shift the automatic transmission to
position N. X
Release the brake pedal.
X Release the parking brake.
i The transmission can only change gear if
the battery has sufficient charge.
If you

cannot move the selector lever to N,
the propeller shafts to the driven axles
must be removed. Transporting the vehicle
Use the towing eyes to pull the vehicle if it
needs to be transported on a trailer or
transporter ( Y page 235).
X Apply the parking brake.
X Turn the SmartKey to position 2 in the
ignition lock.
X Move the selector lever to N.
X Shift the transfer case to neutral position
N (Y page 145).
X Secure the towing cable to the towing eyes.
X Make sure that the vehicle cannot roll
away.
X Release the parking brake.
X Load the vehicle onto the transporter.
X Apply the parking brake.
X Shift the automatic transmission to
position P.
X Turn the SmartKey to position 0 in the
ignition lock and remove it.
X Secure the vehicle.
! Only lash

the vehicle down by the wheels
or wheel rims, not by parts of the vehicle
such as axle or steering components.
Otherwise, the vehicle could be damaged. Recovering a vehicle that has become
stuck
! Pull away smoothly, slowly, and in a
straight line

when pulling out a vehicle that
has become stuck. Excessive tractive
power could damage the vehicles. 236
Towing and tow-starting
Breakdown assistance

about the tire pressure. On vehicles equipped
with the electronic tire pressure monitoring
system, the tire pressure can be checked
using the on-board computer.
G
WARNING
Should the tire pressure drop repeatedly:
R check the tire for foreign bodies.
R check whether
the wheel is losing air or the
valve is leaking.
R make sure that only a valve cap approved
by Mercedes-Benz is installed on the tire
valve.
Tire pressures that are too low have a
negative effect on vehicle safety, which could
lead you to cause an accident.
Only correct tire pressures when the tires are
cold. The tires are cold when the vehicle has
been parked for at least three hours or driven
for less than 1 mile (1.6 km). The tire
temperature changes depending on the
outside temperature, the vehicle speed and
the tire load. If the tire temperature changes
by 18 ‡ (10 †), the tire pressure changes by
approximately 10 kPa (0.1 bar/1.5 psi). Take
this into account when checking the pressure
of warm tires and only correct the tire
pressure if it is too low for the current
operating conditions. If you check the tire
pressure when the tires are warm, the
resulting value will be higher than if the tires
were cold. This is normal. Do not reduce the
tire pressure to the value specified for cold
tires. The tire pressure would otherwise be
too low.
Observe the recommended tire pressure
specifications for cold tires on the Tire and
Loading Information placard on the B-pillar on
the driver's side.
i The specifications given on the following
Tire and Loading Information placard are
examples. Tire pressure specifications are
vehicle-specific and may deviate from the
data shown here. The tire pressures
applicable to your vehicle can be found on the Tire and Loading Information placard on
your vehicle.
You will find recommended tire pressure
specifications
: for

cold tires and for a fully
loaded vehicle's Tire and Loading Information
placard. The tire pressure information is
applicable to all tires mounted at the factory. Important notes on tire pressure
G
WARNING
If the tire pressure drops repeatedly, check
the tires for punctures from foreign objects
and/or whether

air is leaking from the valves
or from around the rim.
The tire temperature and pressure increase
when the vehicle is in motion. This is
dependent on the driving speed and the load.
If you wish to drive at high speeds of 100 mph
(160 km/h) or higher when this is allowed,
use the tire pressure table on the inside of the
fuel filler flap to set the correct tire pressures
when the tires are cold. If the tire pressure is
not set correctly, this can lead to an excessive
build up of heat and a sudden loss of
pressure.
For more information, contact a qualified
specialist workshop.
i Driving comfort can be impaired if the tire
pressure value recommended in the tire
pressure table for speeds over 100 mph
(160 km/h) is adopted. 246
Tire pressure
Wheels and tires

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.
Checking tire pressure electronically X
Make sure that the SmartKey is in position
2(Y page 115) in the ignition lock.
X Press and hold the V or U button on
the multifunction steering wheel until the
standard display appears in the
multifunction display ( Y page 156).
X Press and hold the & or * button
until the current tire pressure of each tire
is shown in the multifunction display.
If the vehicle has been parked for over 20
minutes, the Tire pressure displayed
only after driving for a few
minutes message appears.
i If a spare wheel is mounted, the system
may continue to show the tire pressure of
the wheel

that has been removed for a few
minutes. If this occurs, note that the value
displayed for the position where the spare
wheel is mounted is not the same as the
spare wheel's current tire pressure.
Tire pressure monitor warning
messages If the tire pressure monitor detects a
significant
pressure

loss on one or more tires,
a warning message is shown in the
multifunction display. A warning tone also
sounds and the tire pressure warning lamp
lights up in the instrument cluster.
Each tire that is affected by a significant loss
of pressure is highlighted by a red rectangle.
i If the wheel positions on the vehicle are
interchanged, the tire pressures may be
displayed for the wrong positions for a
short time. This is rectified after a few minutes of driving, and the tire pressures
are displayed for the correct positions.
Restarting the tire pressure monitor G
WARNING
It is the driver's responsibility to set the tire
pressure to the recommended cold tire
pressure. Underinflated

tires affect the ability
to steer or brake the vehicle. You might lose
control over the vehicle.
When you restart the tire pressure monitor,
all existing warning messages are deleted and
the warning lamps go out. The monitor uses
the currently set tire pressures as the
reference values for monitoring.
The tire pressure monitor must be restarted
when you set the tire pressure to a new value
(as a result of changed drive or load
characteristics, for example). The tire
pressure monitor then monitors the new tire
pressure values.
i Canada only: in most cases, the tire
pressure monitor recognizes the new
reference values automatically. However,
you can also define reference values
manually as described here.
Restart the tire pressure monitor after you
have set the tire pressure to the value
recommended for the desired driving
situation ( Y page 245). Only correct tire
pressures on cold tires. Comply with the
recommended tire pressures on the tire and
loading information table on the B-pillar on
the driver's side. Additional tire pressure
values for driving at high speeds or with heavy
loads can be found in the tire pressure table
on the inside of the fuel filler flap.
X Make sure that the tire pressure is correct
on all four wheels.
X Make sure that the SmartKey is in position
2 in the ignition lock.
X Press and hold the V
or U
button on
the multifunction steering wheel until the Tire pressure
251
Wheels and tires Z

TWR (permissible trailer drawbar
noseweight)
The TWR is the maximum permissible weight
that may
act on the ball coupling of the trailer
tow hitch. Wear indicator
Narrow bars (tread wear bars) that are
distributed over

the tire tread. If the tire tread
is level with the bars, the wear limit of 1
/ 16 in
(1.6 mm) has been reached. Distribution of the vehicle occupants
Distribution of vehicle occupants over
designated seat positions in a vehicle. Maximum permissible payload
weight
Nominal load and luggage load plus
68 kilograms (150 lb) multiplied by the
number of seats in the vehicle. Changing a wheel
Flat tire
The "Roadside Assistance" section
(
Y
page

226) contains information and notes
on how to deal with a flat tire. It also provides
instructions on changing a wheel or mounting
the spare wheel. Interchanging the wheels
G
WARNING
Rotate front and rear wheels only if the tires
are of the same dimension.
If your vehicle is equipped with mixed-size
tires (different

tire dimensions front vs. rear),
tire rotation is not possible. G
WARNING
Have the tightening torque checked after
changing a wheel. Wheels could become
loose if not tightened with a torque of
96 lb-ft (130 Nm).
Only use

genuine Mercedes-Benz wheel bolts
specified for your vehicle's rims.
The wear patterns on the front and rear tires
differ, depending on the operating conditions.
Rotate the wheels before a clear wear pattern
has formed on the tires. Front tires typically
wear more on the shoulders and the rear tires
in the center.
If your vehicle's tire configuration allows, you
can rotate the wheels according to the
intervals in the tire manufacturer's warranty
book in your vehicle documents. If this is not
available, the tires should then be replaced
every 3000 to 6000 miles
(5000 to 10,000 km), or earlier if the tire wear
requires this. Do not change the direction of
wheel rotation.
Clean the contact surfaces of the wheel and
the brake disc thoroughly every time a wheel
is interchanged. Check the tire pressure and
reactivate the tire pressure monitor
(Y page 249) if necessary.
Information on changing a wheel and
mounting the spare wheel ( Y page 226).
! On vehicles equipped with a tire pressure
monitor, electronic components are
located in the wheel.
Tire-mounting tools should not be used
near the valve. This could damage the
electronic components.
Only have tires changed at a qualified
specialist workshop. Direction of rotation
Tires with a specified direction of rotation
have additional

benefits, e.g. if there is a risk
of hydroplaning. You will only gain these Changing a wheel
265
Wheels and tires Z