2008 MERCEDES-BENZ G55AMG technical data

424 Technical data
Fuels, coolants, lubricants, etc.
Premium unleaded gasolineFuel requirements
Only use premium unleaded fuel:

The octane number (posted at the
pump) must be 91 min. It is an average
of both the Research Octane Number
(RON) and the Motor Octane Number
(MON): (RON+MON)/2. This is also
known as the ANTI-KNOCK INDEX.
Unleaded gasoline containing oxygenates
such as ethanol, IPA, IBA and TBA can be
used provided the ratio of any one of these
oxygenates to gasoline does not
exceed 10%; MTBE mu st not exceed 15%.
The ratio of methanol to gasoline must not
exceed 3% plus additional cosolvents.
Using mixtures of ethanol and methanol is
not allowed. Gasohol, which contains 10%
ethanol and 90% unleaded gasoline, can
be used.
These blends must also meet all other fuel
requirements, such as resistance to spark
knock, boiling range, vapor pressure, etc.Warning!G
Gasoline is highly flam mable and poisonous.
It burns violently and can cause serious
personal injury.
Never allow sparks, flame or smoking
materials near gasoline!
Turn off the engine before refueling.
Whenever you are around gasoline, avoid
inhaling fumes and skin or clothing contact,
extinguish all smoking materials.
Direct skin contact with fuels and the
inhalation of fuel vapors are damaging to
your health.
!To maintain the engi ne’s durability and
performance, premium unleaded gasoline must
be used. If premium unleaded gasoline is not
available and low octane fuel is used, follow
these precautions:

Have the fuel tank only partially filled with
unleaded regular gasoline and fill up with
premium unleaded gasoline as soon as
possible.

Avoid full throttle driving and abrupt
acceleration.

Do not exceed an engine speed of 3000 rpm
if the vehicle is loaded with a light load such
as two persons and no luggage.

Do not exceed 2/3 of maximum accelerator
pedal position if the vehicle is fully loaded or
operating in mountainous terrain.
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425
Technical data
Fuels, coolants, lubricants, etc.
Gasoline additives
A major concern among engine
manufacturers is ca
rbon build-up caused
by gasoline. Mercedes-Benz recommends
only the use of quality gasoline containing
additives that prevent the build-up of car-
bon deposits.
After an extended period of using fuels
without such additives, carbon deposits
can build up, especially on the intake
valves and in the combustion area, leading
to engine performance problems such as:

Warm-up hesitation

Unstable idle

Knocking/pinging

Misfire

Power loss In areas where carbon deposits may be
encountered due to lack of availability of
gasolines which contain these additives,
Mercedes-Benz recommends the use of
additives approved by us for use on
Mercedes-Benz vehicles. Refer to the
Factory Approved Service Products
pamphlet (USA only) or
contact an autho-
rized Mercedes-Benz Light Truck Center
for a listing of approved product(s). Follow
directions on product label.
Do not blend other fuel additives with fuel.
This only results in unnecessary cost and
may be harmful to the engine operation.
Coolants
The engine coolant is a mixture of water
and anticorrosion/antifreeze, which
provides:

Corrosion protection

Freeze protection

Boiling protection (by increasing the
boiling point)
The cooling system was filled at the factory
with a coolant providing freeze protection
to approximately -35°F (-37°C) and corro-
sion protection.
If the antifreeze mixture is effective to
-35°F (-37°C), the boiling point of the cool-
ant in the pressurized cooling system is
reached at approxim ately 266°F (130°C).
!Damage or malfunction resulting from poor
fuel quality or from blending additional fuel
additives other than those tested and approved
by us for use on Mercedes-Benz vehicles are not
covered by the Mercedes-Benz Limited
Warranty.! Add premixed coolant solution only. Adding
water and MB 325.0 Anticorrosion/Antifreeze
separately from each other, could cause engine
damage not covered by the Mercedes-Benz
Limited Warranty.
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426 Technical data
Fuels, coolants, lubricants, etc.
The coolant solution must be used year
round to provide the necessary corrosion
protection and increase boil-over protec-
tion. Refer to Maintenance Booklet for
replacement interval.
Coolant system design and coolant used
determine the replacement interval. The
replacement interval published in the
Maintenance Booklet is only applicable if
MB 325.0 Anticorrosion/Antifreeze
solution or other Mercedes-Bent approved
products of equal specification are used to
renew the coolant concen tration or bring it
back up to the proper level.
For information on other Mercedes-Benz
approved products of equal specification,
refer to the Factory Approved Service
Products pamphlet (USA only) or contact
an authorized Mercedes-Benz Light Truck
Center. To provide important corrosion protection,
the solution must be at least
50% anticorrosion/antifreeze (equivalent
to freeze protection to approximately
-35°F [-37°C]). If you use a solution that is
more than 55% anticorrosion/antifreeze
(freeze protection to approximately
-49°F [-45°C]), the engine temperature
will increase due to the lower heat transfer
capability of the so
lution. Therefore,
do not use more than this amount of
anticorrosion/antifreeze.
If the coolant level is low, water and
MB 325.0 Anticorrosion/Antifreeze
should be used to bring it up to the proper
level (have cooling system checked for
signs of leakage). Please make sure the
mixture is in accordance with label
instructions.
The water in the cooling system must meet
minimum requirements, which are usually
satisfied by normal drinking water. If you
are not sure about the water quality,
contact an authoriz ed Mercedes-Benz
Light Truck Center. Anticorrosion/antifreeze
Your vehicle contains a number of
aluminum parts. The use of aluminum
components in motor vehicle engines
necessitates that anticorrosion/antifreeze
coolant used in such engines be
specifically formulated to protect the
aluminum parts. Failure to use such
anticorrosion/antifreeze coolant will
result in a significantly shortened service
life.
Therefore, the followin
g product is strongly
recommended for use in your vehicle:
Mercedes-Benz
325.0 Anticorrosion/Antifreeze agent.
Before the start of the winter season (or
once a year in hot southern regions), you
should have the anticorrosion/antifreeze
concentration checked. The coolant is also
regularly checked each time you bring your
vehicle to an authorized Mercedes-Benz
Light Truck Center for service.
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427
Technical data
Fuels, coolants, lubricants, etc.
Anticorrosion/antifreeze quantity
ModelApproximate freeze protection
–35°F (–37°C)–49°F (–45°C)
G 5006.35 US qt (6.0 l)7.0 US qt (6.6 l)
G55AMG6.76 US qt (6.4 l)7.4 US qt (7.0 l)
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. November 2007 8:41 08

428 Technical data
Fuels, coolants, lubricants, etc.
Windshield/rear window washer
system and headlamp cleaning system
Fluid for the windshield/rear window
washer system and the headlamp cleaning
system is supplied from the windshield
washer reservoir. It has a capacity of
7.9 US qt (7.5 l).
The windshield washer reservoir is located
on the passenger side of the engine com-
partment (
page 275).
Refill the washer reservoir with
MB Windshield Washer Concentrate
“MB SummerFit” and water
(or concentrate and commercially
available premixed windshield washer
solvent/antifreeze, depending on
ambient temperatures). Windshield/rear wind
ow washer fluid
mixing ratio
For temperatures above freezing point,
use MB Windshield Washer Concentrate
“MB SummerFit” and water:

1 part “MB SummerFit” to 100 parts
water
(1.34 fl oz [40 ml] “MB SummerFit” to
1gal [4.0l] water)
For temperatures below freezing point,
use MB Windshield Washer Concentrate
“MB SummerFit” and commercially
available premixed windshield washer
solvent/antifreeze:

1 part “MB SummerFit” to 100 parts
solvent
(1.34 fl oz [40 ml] “MB SummerFit” to
1 gal [4.0 l] solvent)
Warning!G
Washer solvent/antifree ze is highly flamma-
ble. Do not spill washer solvent/antifreeze
on hot engine parts, because it may ignite
and burn. You could be seriously burned.
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435
Index
Driving on sand 259
Driving systems 197
Cruise control 197
Driving safety systems 87
Rear Parking Assist 200
Rear view camera 203
Rear view camera* 203
Driving through water 257
E
Easy-entry/exit feature Activating 156
EBB 87, 91
Electrical fuses 403
Electrical outlet 223 In cargo compartment 224
In front passenger footwell 223
In rear passenger footwell 224
Electrical system Technical data 417
Electronic Brake Booster (EBB) 91
Electronic Stability Program see ESP
®
Electronic systems Message in display 363
Electronic Traction System (ETS) 90
Emergency calls Tele Aid 230 Emergency, In case of
Roadside Assistance 232
Emergency operation Remote door unlock, Tele Aid 235
Emergency operation (Limp Home Mode) 169
Emergency operations Closing tilt/sliding sunroof 372
Locking the vehicle 369
Opening tilt/sliding sunroof 372
Unlocking the tailgate 369
Unlocking the vehicle 368
Emergency Tensioning Device see ETD
Emission control 263
Emission control information label 411
Ending A call (telephone) 160
Engine Compartment 267
Starting with SmartKey 54
Technical data 413
Turning off with SmartKey 64
Engine cleaning 316
Engine compartment 267 Hood 267 Engine malfunction indicator lamp 27,
328–329
Engine oil 269, 423 Adding 273
Additives 423
Checking level 269
Consumption 269
Messages in display 271, 349–350
Oil dipstick 272
Engine oil level see Oil level
ESP
®27, 87, 91
Messages in display 339
Switching off 93
Switching on 94
Warning lamp 330–331
ETD 68, 77 Safety guidelines 72
Expanding cargo compartment 206
Extending gear range 168
Exterior lamp switch 117
Exterior lamps Delayed shut-off 153
Exterior rear view mirrors Adjusting 46
Exterior view 22
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436 Index
F
Fastening the seat belts 48
Fine adjustmentCruise control 199
First aid kit 364
Flat tire 388 Lifting the vehicle 389
Lowering the vehicle 392
Mounting the spare wheel 389
Spare wheel 366
Floormats 224
Fog lamp, rear 121, 376
Fog lamps Corner-illuminating front fog lamps 122
Fog lamps, front 121
4-ETS 87, 90
Front air bags 73
Front axle differential lock Switching on 176
Front fog lamps Messages in display 353
Replacing bulbs 376, 380
Front lamps Replacing bulbs 376, 378
Switching on 117 Front passenger front air bag off indicator
lamp 80, 335
Front seat head restraints Installing 109
Removing 108
Front towing eye 402
Front turn signal lamp Replacing bulbs 381
Fuel 265 Additives 425
Gasoline additives 425
Message in display 363
Premium unleaded gasoline 265, 422, 424
Refueling 264
Requirements 424
Reserve warning 27
Technical data 420
Fuel additives 425
Fuel consumption statistics Since last reset 158
Since start 157 Fuel filler cap
Message in display 351
Fuel filler flap 264 Locking 264
Opening 370
Unlocking 264
Fuel requirements 424
Fuel reserve tank Message in display 351
Fuel reserve warning lamp 331
Fuel tank Capacity 422
Filler flap 264
Fuels, coolants, lubricants, etc. Capacities 420
Functions (control system) 135, 137, 139
Fuse box 404, 405, 406
Fuses 403 Fuse box in battery box 406
Fuse box in front passenger footwell 404
Fuse box in middle tunnel 405
Main fuse box in passenger compartment 404
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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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