Page 274 of 417

273 Operation
Tires and wheels
Tire ply material
1Plies in sidewall
2Plies 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 three hours or 
driven no more than one mile (1.6 km).
Curb weight
The weight of a motor vehicle with stan-
dard equipment including the maximum 
capacity of fuel, oil, and coolant, and, if so 
equipped, air conditioning and additional 
optional equipment, but without passen-
gers and cargo.
i
For illustration purposes only. Actual 
data on tires are specific to each vehi-
cle and may vary from data shown in 
above illustration. 
     
        
        Page 323 of 417

322 Practical hints
What to do if …
DisplayPossible causePossible solution
ì FUNCTION
NOT AVAILABLE!This display appears if button t or 
s on the multifunction steering wheel 
is pressed and the vehicle is not equipped 
with a telephone.
Ê TRUNK OPEN!This message will appear whenever the 
tailgate is open.Close the tailgate.
G VISIT WORKSHOP!
DISPLAY MALFUNCTION:The instrument cluster display is malfunc-
tioning.
Some systems themselves may also have 
failed.Continue driving with added caution.
Visit an authorized Mercedes-Benz 
Light Truck Center as soon as 
possible.
± VISIT WORKSHOP!
DISPLAY MALFUNCTION:Certain electronic systems are unable to 
relay information to the control system. 
The following systems may have failed:
Coolant temperature display
Tachometer
Cruise control display
Have the electronic systems checked 
by an authorized Mercedes-Benz Light 
Truck Center.
W WASHER FLUID
CHECK LEVEL!The fluid level has dropped to about 1/3 
of total reservoir capacity.Add washer fluid (page 382). 
     
        
        Page 377 of 417

376 Technical data
Fuels, coolants, lubricants, etc.
Capacities
Vehicle components and their respective 
lubricants must match.Therefore use only products tested and ap-
proved by Mercedes-Benz.Please refer to the Factory Approved 
Service Products pamphlet, or inquire at 
an Mercedes-Benz Light Truck Center.
ModelCapacityFuels, coolants, lubricants, etc.
Engine with oil filterG500
G55AMG8.5 US qt (8.0 l)
9.0 US qt (8.5 l)Approved engine oils
Automatic transmission9.0 US qt (8.5 l)MB Automatic Transmission Fluid
Transfer case2.96 US qt (2.8 l)MB part no. A 001 989 28 03 10
Differential lock mechanism0.47 - 0.63 US qt
(0.45 - 0.6 l)Brake fluid DOT 3+4, SAE J1703
Front axleG500
G55AMG1.5 US qt (1.4 l)
1.5 US qt (1.4 l)Hypoid gear oil SAE 85W-90
Hypoid gear oil Castrol SAF-XJ
Rear axleG500
G55AMG1.9 US qt (1.8 l)
1.9 US qt (1.8 l)Hypoid gear oil SAE 85W-90
Hypoid gear oil Castrol SAF-XJ
Power steeringapprox. 1.06 US qt (1.0 l)MB Power Steering Fluid, or
approved Dexron III ATF
Front wheel hubsapprox. 1.5 oz (43 g) eachHigh temperature roller bearing grease
Fuel tank
including a reserve ofG500
G55AMG25.4 US gal (96.0 l)
25.1 US gal (95.0 l)
3.4 US gal (13.0 l)Premium unleaded gasoline:
Minimum Posted Octane 91 
(average of 96 RON / 86 MON) 
     
        
        Page 378 of 417

377 Technical data
Fuels, coolants, lubricants, etc.
Engine oils
Engine oils are specifically tested for their 
suitability in our engines and durability for 
our service intervals. Therefore, only use 
approved engine oils and oil filters re-
quired for vehicles with Maintenance 
System (U.S. vehicles) or FSS (Canada 
vehicles). For a listing of approved engine 
oils and oil filters, refer to the Factory 
Approved Service Products pamphlet, or 
contact an authorized Mercedes-Benz 
Light Truck Center.Using engine oils and oil filters of specifica-
tion other than those expressly required 
for the Maintenance System (U.S. vehi-
cles) or FSS (Canada vehicles), or changing 
of oil and oil filter at change intervals 
longer than those called for by the 
Maintenance System (U.S. vehicles) or 
FSS (Canada vehicles) will result in engine 
damage not covered by the 
Mercedes-Benz Limited Warranty.Please follow Maintenance System (U.S. 
vehicles) or FSS (Canada vehicles) recom-
mendations for scheduled oil changes. 
Failure to do so will result in engine dam-
age not covered by the Mercedes-Benz 
Limited Warranty.
ModelCapacityFuels, coolants, lubricants, etc.
Cooling systemG 500
G55AMGapprox. 12.7 US qt (12.0 l)
approx. 13.4 US qt (12.7 l)MB 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 Concentrate 
and water1
1Use MB Windshield Washer Concentrate “S” and water for temperatures above freezing point or MB Windshield Washer Concentrate “S” and commercially available
premixed windshield washer solvent / antifreeze for temperatures below freezing point. Follow suggested mixing ratios (page 382).