2007 MERCEDES-BENZ G55AMG cooling

350 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
•The cooling fan for the coolant is
malfunctioning.Observe the coolant temperature
gauge in the multifunction display
(
page 26).
If the coolant temperature is
below 120°C, you may continue
driving to the nearest specialist
workshop.
Avoid placing heavy loads on the
engine (e.g. by driving uphill) as well as
stop-and-go traffic.
Have the fan replaced as soon as
possible.
ÑCr. control
and SPEED-
TRONIC
inoperativeThe cruise control is malfunctioning.Have the cruise control checked at an
authorized Mercedes-Benz Light Truck
Center.
JYou are attempting to drive with one or
more doors open.Close the doors.

424 Technical data
Fuels, coolants, lubricants, etc.
ModelCapacityFuels, coolants, lubricants, etc.
Fuel tank
including a reserve ofG500
G55AMG25.4 US gal (96.0 l)
25.1 US gal (95.0 l)
approx. 3.4 US gal (13.0 l)Premium unleaded gasoline:
Minimum Posted Octane 91
(Avg. of 96 RON/86 MON)
Cooling systemG500
G55AMGapprox. 12.7USqt (12.0l)
approx. 13.4USqt (12.7l)MB 325.0 Anticorrosion/Antifreeze
Air conditioning systemR-134a refrigerant and
special PAG lubricant oil (never R-12)
Windshield/rear window washer system
and headlamp cleaning systemapprox. 7.9 US qt (7.5 l)MB Windshield Washer Concentrate1
1Use MB Windshield Washer Concentrate “MB SummerFit” and water for temperatures above freezing point or MB Windshield Washer Concentrate “MB SummerFit”
and commercially available premixed windshield washer solvent/antifreeze for temperatures below freezing point. Follow suggested mixing ratios (page 430).

427 Technical data
Fuels, coolants, lubricants, etc.
Gasoline additives
A major concern among engine
manufacturers is carbon 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 lossIn 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 approximately 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.

428 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 concentration 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 solution. 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 authorized 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 following 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.

431 Index
A
ABS 27, 88
Indicator lamp 324–325, 327
LOW RANGE mode 90
Messages in display 340
Accelerator position (Automatic
transmission) 166
Accessory weight 304
Accident
In case of 61
Activating
Air conditioning (cooling) 190
Air recirculation mode 188
Anti-theft alarm system 97
Central locking (control system) 155
Defrost 187
Easy-entry/exit feature 156
ESP
®95
Exterior headlamps 56
Exterior lamps 118
Exterior rear view mirror parking
position 178Headlamps 56
Immobilizer 96
Rear window defroster 181
Windshield defroster 181
Windshield wipers 58
Adding
Coolant 275
Engine oil 273
Additional turn signals 378
Adjusting 41
Air distribution 186
Air volume 186
Exterior rear view mirrors 46
Head restraint fore and aft
adjustment 43
Head restraint height 43
Head restraint height, rear seats 110
Instrument cluster illumination 130
Interior rear view mirror 46
Mirrors 46
Multicontour seat* 109Seat backrest tilt 43
Seat cushion depth 109
Seat cushion tilt 43
Seat fore and aft adjustment 43
Seat height 43
Seats 41
Steering column in/out 45
Steering column up/down 45
Steering wheel 44
Advanced TPMS
Messages in display 342–343,
361–362
Air bags 70
BabySmart
TM air bag deactivation
system 81
Front 73
Safety guidelines 72
Window curtain air bags 74
Air conditioning 189
Air conditioning refrigerant 425
Air distribution
Adjusting 186

436 Index
D
Data recording (vehicle) 20
Daytime running lamp mode 119
Setting 151
Deactivating
Air conditioning (cooling) 189
Air recirculation mode 189
Alarm 97
Anti-theft alarm system 97
Central locking (control system) 155
Cruise control 198
Defrost 188
ESP
®94
Exterior lamps 118
Exterior lamps delayed shut-off 153
Headlamps 64
Immobilizer 96
Interior lighting delayed shut-off 154
Rear window defroster 181
Tow-away alarm 98
Windshield defroster 181
Deep water see Standing water
Defrosting 187
Delayed shut-off
Exterior lamps 153
Interior lighting 154Department of Transportation see DOT
Dialing
A number (telephone) 160
Differential locks 173
Switching off 176
Switching on 175
Difficulties
While driving see Problems while
driving
With starting 54
Direction of rotation (tires) 280
Discharged battery
Jump starting 399
Disconnecting
Vehicle battery 398
Displays
Maintenance service indicator
message 311
Messages 271, 338
Selecting display for status
indicator 150
Showing vehicle status
messages 145
Door
Entry lamps 129
Remote door unlock (Tele Aid) 235Door control panel 33
Door handle 33
Doors
Message in display 350
Opening from the inside 104
DOT 305
Downhill driving
Cruise control 198
Drink holders see Cup holders
Drinking and driving 245
Driving
General instructions 48, 245
In winter 251
Problems 61
Safety systems 88
Through standing water 252
Driving abroad 261
Driving and safety systems
4-ETS 91
ABS 88
BAS 90
EBB 92
ESP
®92
Driving instructions 245
Passenger compartment 252
Driving off 247