tire pressure MERCEDES-BENZ G-Class 2012 W463 User Guide

X
After driving for extended periods across
sand, mud,
gravel, water or in similarly dirty
conditions, have the brake discs, wheels,
brake pads/linings and axle joints checked
and cleaned.
X If you notice strong vibrations after off-road
driving, check for foreign objects in the
wheels and drive train and, if necessary,
remove them. Foreign objects can disturb
the balance and cause vibrations.
X Test the brakes.
Driving on sand G
WARNING
Do not reduce the tire inflation pressure
before driving through sand. However, if you
do so, remember to correct the tire inflation
pressure before continuing your trip. Driving
with reduced

tire inflation pressure increases
the risk of losing control of the vehicle and
rolling over.
Observe the following rules when driving on
sand:
R shift the transfer case to
LOW (Y page 145).
R avoid high engine speeds.
R limit the shift range of the automatic
transmission according to the off-road
conditions.
R drive quickly to overcome the rolling
resistance. Otherwise, the vehicle could dig
itself into the sand.
R drive in the tracks of other vehicles if
possible. Make sure that the ruts are not
too deep, that the sand is firm enough and
that your vehicle has sufficient ground
clearance.
Tire ruts and gravel roads Observe the following rules when driving
along
ruts

in off-road terrain or on roads with
loose gravel: !
Check that the ruts are not too deep and
that your vehicle has sufficient clearance.
Otherwise, your vehicle could be damaged
or bottom out and get stuck.
R shift the transfer case to
LOW (Y page 145).
R avoid high engine speeds.
R observe the

safety notes (Y page 134) and
the general notes (Y page 135) on off-road
driving.
R restrict the shift range of the automatic
transmission to 1 (Y page 121).
R drive slowly.
R where ruts are too deep, drive with the
wheels of one side on the center grassy
area, if possible.
Driving over obstacles !
Obstacles could damage the floor of the
vehicle or components of the chassis. Ask
passengers for

guidance when driving over
large obstacles. The passenger should
always keep a safe distance from the
vehicle when doing so in order to avoid
injury as a result of unexpected vehicle
movements. After driving off-road or over
obstacles, check the vehicle for possible
damage, especially to the underbody and
the components of the chassis.
Observe the following rules when driving over
tree stumps, large stones and other
obstacles: Driving tips
137
Driving and parking Z

Menus and submenus
Overview of menus
The number of menus shown depends on the optional equipment in the vehicle. Function
:
Standard display
menu ( Y page 156)
R tire pressure monitor (Y page 249)
R service interval display ( Y

page 215)
R G 55 AMG: oil level (Y page 211) ;
Audio
menu (
Y page 156)
=
Navigation menu (Y page 158)
?
Message memory
9
menu ( Y page 165)
A
Settings menu (Y page 158)
B
Trip computer
menu ( Y page 162)
C
Telephone
menu ( Y page 163)
9
The menu is only visible when there is a display message. Menus and submenus
155
On-board computer and displays Z

Standard display menu
Standard display X
Press the V or U button on the
steering wheel to select the standard
display. Standard display
:
Trip odometer
; Odometer
You can select the following functions in the
Standard display menu using the & or
* button:
R tire pressure monitor (Y page 249)
R digital speedometer or outside
temperature ( Y page 156)
R Service display (Y

page 215)
R G 55 AMG: oil level ( Y page 211)
X To reset the trip odometer: press and
hold the reset button in the instrument
cluster until the trip odometer is reset.
Displaying the digital speedometer or
outside temperature If you have selected the digital speedometer
as the status line (
Y
page 159), the outside
temperature is displayed here 10
. G
WARNING
The outside temperature indicator is not
designed to serve as an ice-warning device
and is therefore unsuitable for that purpose. Indicated temperatures just above the
freezing
point

do not guarantee that the road
surface is free of ice. The road may still be icy,
especially in wooded areas or on bridges. Digital speedometer (example)
Outside temperature (example)
X
Press the
V or U button on the
steering wheel to select the standard
display.
X Press the & or * button on the
steering to select digital speedometer :
or the outside temperature. Audio menu
Selecting a radio station i
SIRIUS XM satellite radio acts like a
normal radio.
For more information on satellite radio
operation, see the separate operating
instructions.
10 Vehicles for the United Kingdom: the outside temperature is always displayed.156
Menus and submenus
On-board computer and displays

Safety systems
Display messages Possible causes/consequences and
M Solutions
ESP
Inoperative See
Operator's Manual
G
Risk of accident
ESP ®
(Electronic Stability Program) is not available due to a
malfunction.
ABS (Anti-lock

Brake System), BAS (Brake Assist), EBD (electronic
brake force distribution), 4ETS (Electronic Traction System) and
the tire pressure monitor have also been deactivated.
The brake system continues to function normally, but without the
functions listed above.
X Drive on carefully.
X Visit a qualified specialist workshop immediately. ABS
ABS not available
Differential
Locked You have engaged the differential locks.
X
Disengage the differential locks.
Subsequently ABS is reactivated. ABS
Inoperative See
Oper. Manual
G
Risk of accident
ABS and ESP ®
are not available due to a malfunction.
BAS, EBD and 4ETS have also been deactivated.
The brake

system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
X Drive on carefully.
X Visit a qualified specialist workshop immediately. $
(USA only)
!(Canada only)
Release Parking
Brake You are driving with the parking brake applied.
X
Release the parking brake. $ (USA only)
J(Canada only)
Check Brake Fluid
Level G
Risk of accident
There is insufficient brake fluid in the brake fluid reservoir.
X Pull over as soon as it is safe to do so.
X Do not continue driving under any circumstances.
X Engage the parking brake.
X Consult a qualified specialist workshop.
X Do not add brake fluid. This will not rectify the malfunction.166
Display messages
On-board computer and displays

Tires
G
WARNING
Do not drive with a flat tire. A flat tire affects the ability to steer or brake the vehicle. You may
lose control of the vehicle. Continued driving with a flat tire will cause excessive heat build-up
and possibly a fire. G
WARNING
Follow recommended tire inflation pressures.
Do not
underinflate tires. Underinflated tires wear excessively and/or unevenly, adversely affect
handling and fuel economy, and are more likely to fail from being overheated.
Do not overinflate tires. Overinflated tires can adversely affect handling and ride comfort, wear
unevenly, increase stopping distance, and result in sudden deflation (blowout) because they are
more likely to become punctured or damaged by road debris, potholes etc. Display messages Possible causes/consequences and
M
Solutions
Tire pressure
displayed only
after driving for
a few minutes The tire pressure monitor is measuring the tire pressure.
X
Drive on.
The tire

pressures appear in the multifunction display after you
have been driving for a few minutes. Tire Pres.
Check Tires
G
Risk of accident
The
tire pressure monitor has detected a significant pressure loss.
X Stop the vehicle without making any sudden steering or braking
maneuvers. Pay

attention to the traffic conditions as you do so.
X Check the tires.
X Check the tire pressure and correct it if necessary
(Y page 242).
X Repair or change the faulty wheel as necessary ( Y page 226).
X Then restart the tire pressure monitor when the tire pressure is
correct (

Y page 249). Tire Pres. Monitor
Inoperative The tire pressure monitor is deactivated due to a malfunction.
X
Visit a qualified specialist workshop. Tire Pres. Monitor
Inoperative No
Wheel Sensors The wheels mounted do not have a suitable tire pressure sensor.
The tire pressure monitor is deactivated.
X
Mount wheels with suitable tire pressure sensors.
The tire

pressure monitor is activated automatically after driving
for a few minutes. Display messages
175
On-board computer and displays Z

Display messages Possible causes/consequences and
M SolutionsCaution Tire Defect
G
Risk of accident
The tire pressure in one or more tires has dropped suddenly. The
wheel position is shown in the multifunction display.
X Stop the vehicle without making any sudden steering or braking
maneuvers. Pay
attention to the traffic conditions as you do so.
X If necessary, change a wheel ( Y page 226).Correct The
Tire Pres. The tire pressure is too low in at least one of the tires, or the tire
pressure difference between the wheels is too great.
X
Check the tire pressures at the next opportunity. If necessary,
correct the tire pressure ( Y page 245).
X Restart the tire pressure monitor (Y page 251). Wheel Sensor
Missing There is no signal from the tire pressure sensor of one or several
wheels. The pressure of the affected tire is not displayed in the
multifunction display.
X
Have the faulty tire pressure sensor replaced at a qualified
specialist workshop. Tire Pres. Monitor
Currently
Unavailable Due to a source of radio interference, no signals can be received
from the wheel sensors. The tire pressure monitor is temporarily
malfunctioning.
X
Drive on.
The tire

pressure monitor restarts automatically as soon as the
problem has been solved. h
Correct The Tire
Pres. The tire pressure is too low in at least one of the tires, or the tire
pressure difference between the wheels is too great.
X
Check the tire pressures at the next opportunity. If necessary,
correct the tire pressure ( Y page 248).176
Display messages
On-board computer and displays

Display messages Possible causes/consequences and
M Solutionsh
Tire
Pres.
Caution
Tire Defect G
Risk of accident
The tire pressure in one or more tires has dropped suddenly.
X Stop the vehicle without making any sudden steering or braking
maneuvers. Pay

attention to the traffic conditions as you do so.
X If necessary, change a wheel ( Y page 226).h
Tire Pres. Check
Tires G
Risk of accident
The tire pressure in one or more tires has dropped significantly.
X Stop the vehicle without making any sudden steering or braking
maneuvers. Pay

attention to the traffic conditions as you do so.
X If necessary, change a wheel ( Y page 226).
X Check the tire pressure. If necessary, correct the tire pressure
(Y page 248). Vehicle
Display messages Possible causes/consequences and
M Solutions: The rear door is open.
X
Close the rear door. M G
Risk of accident
Vehicles with anti-theft alarm system:
The hood is open. A warning tone also sounds.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Apply the parking brake.
X Close the hood. ¡ At least one door is open.
X
Close all the doors. ~
Bluetooth Ready The Bluetooth
®
connection between your mobile phone and
COMAND is not activated.
X If desired, activate the Bluetooth ®
connection between your
mobile phone and COMAND (see the separate Operator's
Manual). ¥
Top
Up

Washer Fluid The washer fluid level in the washer fluid reservoir has dropped
below the minimum.
X
Add washer fluid ( Y page 214). Display messages
177
On-board computer and displays Z

Tires
Problem Possible causes/consequences and
M Solutions
h
USA only:
The
yellow

tire pressure
monitor warning lamp
(pressure loss/
malfunction) is lit.
Canada only:
The yellow tire pressure
monitor warning lamp
(pressure loss) is lit. G
Risk of accident
The tire pressure monitor has detected a loss of pressure in at
least one of the tires.
X Stop
the vehicle without making any sudden steering or braking
maneuvers. Pay

attention to the traffic conditions as you do so.
X Observe the additional display messages in the multifunction
display.
X Check the tire pressure. If necessary, correct the tire pressure
(Y page 249).
X If necessary, change a wheel ( Y page 265).h
USA only:
The
yellow

tire pressure
monitor warning lamp
(pressure loss/
malfunction) flashes for
60 seconds and then
remains lit. The tire pressure monitor is defective.
X
Observe the additional display messages in the multifunction
display.
X Visit a qualified specialist workshop. G
WARNING
Each tire, including the spare (if provided), should be checked at least every two weeks when
cold and inflated to the pressure recommended by the vehicle manufacturer on the Tire and
Loading Information placard on the driver's door B-pillar or, if available, the tire pressure label
on

the inside of the fuel filler flap. If your vehicle has tires of a different size than the size indicated
on the Tire and Loading Information placard or the tire pressure label, you should determine the
proper tire pressure for those tires.
As an added safety feature, your vehicle has been equipped with a tire pressure monitoring
system (TPMS) that illuminates a low tire pressure telltale when one or more of your tires are
significantly underinflated. Accordingly, when the low tire pressure telltale illuminates, you should
stop and check your tires as soon as possible, and inflate them to the proper pressure. Driving
on a significantly underinflated tire causes the tire to overheat and can lead to tire failure.
Underinflation also reduces fuel efficiency and tire tread life, and may affect the vehicle's handling
and stopping ability. Please note that the TPMS is not a substitute for proper tire maintenance,
and it is the driver's responsibility to maintain correct tire pressure, even if underinflation has
not reached the level to trigger illumination of the TPMS low tire pressure telltale.
USA only:
Your vehicle has also been equipped with a TPMS malfunction indicator to indicate when the
system is not operating properly. The TPMS malfunction indicator is combined with the low tire
pressure telltale. When the system detects a malfunction, the telltale will flash for approximately
1 minute and then remain continuously illuminated. This sequence will be repeated every time Warning and indicator lamps in the instrument cluster
185
On-board computer and displays
Z

the vehicle is started as long as the malfunction exists. When the malfunction indicator is
illuminated, the system may not be able to detect or signal low tire pressure as intended.
TPMS
malfunctions
may occur for a variety of reasons, including the installation of incompatible
replacement or alternate tires or wheels on the vehicle that prevent the TPMS from functioning
properly. Always check the TPMS malfunction telltale after replacing one or more tires or wheels
on your vehicle to ensure that the replacement or alternate tires and wheels allow the TPMS to
continue to function properly. 186
Warning and indicator lamps in the instrument cluster
On-board computer and displays

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