2008 MERCEDES-BENZ G55AMG Brakes

277
Operation
Tires and wheels
 Tires and wheels
Contact an authorized Mercedes-Benz
Light Truck Center for information on test-
ed and recommended rims and tires for
summer and winter operation. They can
also offer advice concerning tire service
and purchase.Important guidelines

Only use sets of tires and rims of the
same type and make.

Tires must be of the correct size for the
rim.

Break in new tires for approximately
60 miles (100 km) at moderate
speeds.

Regularly check the tires and rims for
damage. Dented or bent rims can
cause tire inflation pressure loss and
damage to the tire beads.

If vehicle is heavily loaded, check tire
inflation pressure and correct as
required.

Do not allow your tires to wear down
too far. Adhesion properties on wet
roads are sharply reduced at tread
depths of less than
1/8in (3 mm).

When replacing individual tires, you
should mount new tires on the front
wheels first (on vehicles with
same-sized wheels all around).
Warning!G
Replace rims or tires with the same designa-
tion, manufacturer and type as shown on the
original part. See an authorized
Mercedes-Benz Light Truck Center for fur-
ther information. If incorrectly sized rims
and tires are mounted:

The wheel brakes or suspension
components can be damaged.

The operating clearance of the wheels
and the tires may no longer be correct.
Warning!G
Worn, old tires can cause accidents. If the
tire tread is badly worn, or if the tires have
sustained damage, replace them.
When replacing rims, only use genuine
Mercedes-Benz wheel bo lts specified for the
particular rim type. Failure to do so can
result in the bolts loos ening and possibly an
accident.
Retreaded tires are not tested or recom-
mended by Mercedes-Benz, since previous
damage cannot always be recognized on
retreads. The operating safety of the vehicle
cannot be assured when such tires are used.
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291
Operation
Tires and wheels
Warning!G
The Advanced TPMS does not indicate a
warning for wrongly selected inflation pres-
sures. Always adjust ti
re inflation pressure
according to the Tire and Loading Informa-
tion placard on the driver’s door B-pillar or,
if available, the supplemental tire inflation
pressure information on the inside of the
fuel filler flap.
The Advanced TPMS is not able to issue a
warning due to a sudden dramatic loss of
pressure (e.g. tire blowout caused by a for-
eign object). In this case bring the vehicle to
a halt by carefully applying the brakes and
avoiding abrupt steering maneuvers.
Warning!G
Each tire, including the spare (if provided),
should be checked monthly when cold and
inflated to the inflation pressure recom-
mended by the vehicle manufacturer on the
Tire and Loading Information placard or the
tire inflation pressure label (if available). If
your vehicle has tires of a different size than
the size indicated on the Tire and Loading
Information placard or the tire inflation
pressure label (if av ailable), you should
determine the proper tire inflation pressure
for those tires.
As an added safety feature, your vehicle has
been equipped with an Advanced Tire Pres-
sure Monitoring System (Advanced TPMS)
that illuminates a low tire pressure telltale
when one or more of yo ur tires is significant-
ly underinflated. Acco rdingly, when the low
tire pressure telltale illuminates, you should
stop and check your tires as soon as possi-
ble, and inflate them to the proper pressure.
Driving on a significantly underinflated tire
causes the tire to over heat and can lead to
tire failure.
Underinflation also reduces fuel efficiency
and tire tread life, and may affect the vehi-
cle’s handling and stopping ability. Please
note that the Advanced TPMS is not a sub-
stitute for proper tire maintenance, and it is
the driver’s responsibility to maintain cor-
rect tire pressure, even if underinflation has
not reached the level to trigger illumination
of the Advanced TPMS low tire pressure tell-
tale.
USA only: Your vehicle has also been
equipped with a Advanced TPMS malfunc-
tion indicator to indica te when the system is
not operating properly. The Advanced 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 illuminate d. This sequence will
continue upon subsequent vehicle start-ups
as long as the malfunction exists.

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304 Operation
Tires and wheels
Tire ply material1 Plies in sidewall
2 Plies under tread
This marking tells you about the type of
cord and number of plies in the sidewall
and under the tread.Tire and loading terminology
Accessory weight
The combined weight (in excess of those
standard items which may be replaced) of
automatic transmission, power steering,
power brakes, power windows, power
seats, radio, and heater, to the extent that
these items are available as
factory-installed equipment (whether
installed or not).
Air pressure
The amount of air inside the tire pressing
outward on each square inch of the tire.
Air pressure is expressed in pounds per
square inch (psi), or kilopascal (kPa) or
bars.
Aspect ratio
Dimensional relationship between tire
section height and section width
expressed in percentage. Bar
Another metric unit for air pressure. There
are 14.5038 pounds per square inch (psi)
to 1 bar; there are 100 kilopascals (kPa)
to 1 bar.
Bead
The tire bead contains steel wires wrapped
by steel cords that hold the tire onto the
rim.
Cold tire inflation pressure
Tire inflation pressure when your vehicle
has been sitting for
at least 3 hours or
driven no more than 1 mile (1.6 km).
Curb weight
The weight of a motor vehicle with stan-
dard equipment incl uding the maximum
capacity of fuel, oil, and coolant, and, if so
equipped, air conditioning and additional
optional equipment, but without passen-
gers and cargo.
iFor illustration purposes only. Actual data
on tires are specific to each vehicle and may vary
from data shown in above illustration.
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306 Operation
Tires and wheels
Production options weight
The combined weight of those installed
regular production options weighing over
5 lbs (2.3 kilograms) in excess of those
standard items which they replace, not
previously considered in curb weight or
accessory weight, including heavy duty
brakes, ride levelers, heavy duty battery,
and special trim.
PSI (P
ounds per square inch)
A standard unit of measure for air pressure
-> bar, kilopascal (kPa).
Recommended tire inflation pressure
Recommended tire inflation pressure for
normal driving conditions is listed on the
Tire and Loading Information placard locat-
ed on the driver’s door B-pillar. Provides
best handling, tread life and riding com-
fort. If so equipped, supplemental informa-
tion pertaining to special driving situations
can be found on the tire inflation pressure
label on the inside of the fuel filler flap. Rim
A metal support for a tire or a tire and tube
assembly upon which the tire beads are
seated.
Sidewall
The portion of a tire between the tread and
the bead.
TIN (Tire Identification Number)
Unique identifier which facilitates efforts
by tire manufacturers to notify purchasers
in recall situations or other safety matters
concerning tires and gives purchases the
means to easily identify such tires. The TIN
is comprised of “Manufacturer’s identifi-
cation mark”, “Tire size”, “Tire type code”
and “Date of manufacture”.
Tire load rating
Numerical code associated with the
maximum load a tire can support. Tire ply composition and material used
This indicates the number of plies or the
number of layers of ru
bber-coated fabric in
the tire tread and sidewall. Tire manufac-
turers also must indicate the ply materials
in the tire and sidewall, which include
steel, nylon, polyester, and others.
Tire speed rating
Part of tire designation; indicates the
speed range for which a tire is approved.
Total load limit
Rated cargo and luggage load plus
68 kilograms (150 lbs) times the vehicle’s
designated seating capacity.
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320 Operation
Vehicle care
Clean the wiper blade inserts with a
clean cloth and detergent solution.
Use a soft, clean cloth and a mild
window cleaning solution on all outside
and inside glass surfaces.
An automotive glass cleaner is recom-
mended.Light alloy wheels
If possible, clean wheels once a week.Use Mercedes-Benz approved Wheel
Care, a soft bristle brush and a strong
spray of water for cleaning the light
alloy wheels.
Plastic and rubber parts
Use a gentle dishwashing detergent or
mild detergent for delicate fabrics as a
washing solution.
Wipe with a cloth moistened in a
lukewarm solution.
The surface may temporarily change
color. If this is the case, wait for it to
dry.
!Fold the windshield wiper arms back onto
the windshield before turning the SmartKey in
the starter switch.
Hold on to the wiper when folding the wiper arm
back. If released, the force of the impact from
the tensioning spring could crack the windshield.
!To clean the window interior, do not use a
dry cloth, abrasives, solvents or cleaners con-
taining solvents. Do not touch the inside of the
front, rear or side windows with hard objects
such as an ice scraper or ring. Doing so may
damage the windows.
!Only use acid-free cleaning materials. Acid
may cause corrosion or damage the clear coat.
!The vehicle should not be parked for an
extended period of time immediately after it has
been cleaned, especially not after the wheel rims
have been cleaned with wheel rim cleaner.
Wheel rim cleaners can lead to increased
corrosion of the brake disks and brake pads.
Non-approved wheel cleaners may also damage
the wheel paint if the car is not driven after
cleaning. Therefore, the vehicle’s brake system
should always be warmed-up before it is parked
after cleaning. To do so, please drive your vehicle
for several minutes to allow the brakes to dry.
When applying Mercedes-Benz approved Tire
Care and Mercedes-Benz approved Wheel Care
products, take care not to spray them on the
brake disks.
Warning!G
Do not use cleaners or cockpit care sprays
containing solvents to clean the cockpit or
the steering wheel. Cleaners containing
solvents will make the surface porous and
vehicle occupants could suffer serious
injuries from plastic parts coming loose in
the event of air bag deployment.

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431
Index
Batteries
SmartKey (replacing) 374
Batteries, SmartKey Check lamp 103
Checking 103
Battery box Fuse box in 406
Battery discharged Jump starting 397
Battery, vehicle 394 Charging 396
Disconnecting 396
Messages in display 342–343
Reconnecting 396
Reinstalling 396
Removing 396
Bead 304
Block heater (Canada only) 310
Blocking rear door window operation 85
B-pillar 410
Brake fluid 266, 423 Message in display 344
Brake lamp bulbs, left and right 376
Brake lamp, high mounted 376
Brake lamps Messages in display 352 Brake pads
Message in display 345
Brakes 246 Warning lamp 326–327
Break-in period 244
Brush guard 373 Lowering 373
Raising and securing 373
Bulbs, replacing Additional turn signals 376
Backup lamps 376, 384
Brake lamps 376, 384
Front fog lamps 376, 380
Front lamps 376
Front turn signal lamps 376, 381
High beam lamps 376
High mounted brake lamp 376
License plate lamps 376, 385
Locator lighting lamps 376
Low beam lamps 376
Parking lamps 376, 378 Rear fog lamp 376, 384
Rear lamps 376
Rear turn signal lamps 376
Side marker lamps 376, 382
Standing lamps 376, 378
Tail lamp assemblies 376
Tail lamp unit 383
C
Call priority, Tele Aid 235
Calling up Maintenance service indicator display 313
Range (distance to empty) 158
Capacities Fuels, coolants, lubricants, etc. 420
Cargo area see Cargo compartment
Cargo compartment Expanding 206
Tailgate 105
Tie-down rings 209
Cargo compartment cover blind 214 Installing 214
Removing 214
Rolling out 214
Rolling up 214
Cargo compartment lamps 127
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439
Index
Lamps in instrument cluster 324
Lamps, exterior
Front 376
Messages in display 352–357
Rear 376
Replacing bulbs for front 378
Replacing bulbs for rear 383
Lamps, indicator and warning ABS 324–325, 327
Battery (SmartKey) 102
Brakes 326–327
check engine 328–329
Engine diagnostics 328–329
ESP
®330–331
Fuel reserve 331
Instrument cluster 324–332
SRS 69, 332
Turn signals 27
Language Setting 149
LATCH child seat anchors 82
Layout of poly-V-belt drive 412
Leather upholstery Cleaning 322 License plate lamps
Messages in display 354
Replacing bulbs 376, 385
Lifting Vehicle 389
Light alloy wheels Cleaning 320
Technical data 415, 416
Light sensor Message in display 352
Lighter see Cigarette lighter
Lighting 117 Automatic headlamp mode 118
Combination switch 122
Daytime running lamp mode 119
Exterior lamp switch 117
Front fog lamps 121
High beam flasher 122
High beams 122
Instrument cluster illumination 130
Interior, front 125
Interior, rear 126
Locator lighting 120
Low beams 117
Manual headlamp mode 118
Night security illumination 120 Parking lamps 117
Rear fog lamp 121
Settings (control system) 151
Limiting gear range 168
Limp Home Mode 169
Loading 206 Cargo compartment cover blind 214
Cargo tie-down rings 209
Instructions 208
Partition net* 210
Roof rack 206
Loading terminology 304
Loading the vehicle 280
Locator lighting 120 Setting 152
Locator lighting lamps Replacing bulbs 376
Locking 62, 100 Fuel filler flap 264
Global, SmartKey 102
Vehicle in an emergency 369
Loss of keys 103
Loss of Service and Warranty Information Booklet 409
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