2007 MERCEDES-BENZ G55AMG fuel pressure

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 rubber-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.

329 Practical hints
What to do if …
ProblemPossible cause/consequenceSuggested solution
ú(USA only)
±(Canada only)
The yellow engine malfunc-
tion indicator lamp comes on
while driving.A loss of pressure has been
detected in the fuel system. The fuel
filler cap may not be closed properly
or the fuel system may be leaky.Check the fuel filler cap (page 264).
If it is not closed properly:
Close the fuel filler cap.
If it is closed properly:
Have the fuel system checked at an
authorized Mercedes-Benz Light
Truck Center.
Your fuel tank is empty.After refueling start, turn off and
restart the engine three or four times
in succession.
The limp-home (emergency opera-
tion) mode is canceled. You do not
need to have your vehicle checked.

336 Practical hints
What to do if …
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 on the
driver’s door B-pillar or, if available, the tire
inflation 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 inflation pressure label, you should
determine the proper tire inflation pressure
for those tires.
As an added safety feature, your vehicle has
been equipped with a Advanced Tire Pres-
sure Monitoring System (Advanced TPMS)
that illuminates a low tire pressure telltale
when one or more of your tires is signifi-
cantly 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 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 indicate 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 illuminated. This sequence will
continue upon subsequent vehicle start-ups
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.
Advanced TPMS malfunctions may occur for
a variety of reasons, including the installa-
tion of replacement or alternate tires or
wheels on the vehicle that prevent the Ad-
vanced TPMS from functioning properly. Al-
ways check the Advanced TPMS
malfunction telltale after replacing one or
more tires or wheels on your vehicle to en-
sure that the replacement or alternate tires
and wheels allow the Advanced TPMS to
continue to function properly.

353 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
AReserve fuel
levelThe fuel level has dropped below the
reserve mark.Refuel at the next gas station
(
page 264).
4Gas cap
is openA loss of pressure has been detected in
the fuel system. The fuel filler cap may
not be closed properly or the fuel system
may be leaky.Check the fuel filler cap (page 264).
If it is not closed properly:
Close the fuel filler cap.
If it is closed properly:
Have the fuel system checked at an
authorized Mercedes-Benz Light Truck
Center.
YYou are driving with the hood open.Risk of accident!
Stop the vehicle in a safe location or as
soon as it is safe to do so.
Close the hood (page 269).
IRemove
keyYou have forgotten to remove the
SmartKey from the starter switch.Remove the SmartKey from the starter
switch.
Get a new
keyThe SmartKey is no longer functional.Contact an authorized Mercedes-Benz
Light Truck Center.

416 Technical data
Rims and tires
!Only use tires which have been tested and
approved by Mercedes-Benz. Tires approved by
Mercedes-Benz are developed to provide best
possible performance in conjunction with the
driving safety systems on your vehicle such as
ABS or ESP
®. Tires specially developed for your
vehicle and tested and approved by
Mercedes-Benz can be identified by finding the
following on the tire’s sidewall:

MO = Mercedes-Benz Original equipment
tires
Using tires other than those approved by
Mercedes-Benz may result in damage that is not
covered by the Mercedes-Benz Limited
Warranty.
!Using tires other than those approved by
Mercedes-Benz can have detrimental effects,
such as

poor handling characteristics

increased noise

increased fuel consumption
Moreover, tires and rims not approved by
Mercedes-Benz may, under load, exhibit dimen-
sional variations and different tire deformation
characteristics that could cause them to come
into contact with the vehicle body or axle parts.
Damage to the tires or the vehicle may be the
result.
iFurther information on tires and rims is
available at any authorized Mercedes-Benz Light
Truck Center. The Tire and Loading Information
placard with the recommended tire inflation
pressures is located on the driver’s door B-pillar.
Some vehicles may have supplemental tire
inflation pressure information for driving at high
speeds (
page 287) or for vehicle loads less
than the maximum loaded vehicle condition
(
page 287). If such information is provided, it
can be found on the tire inflation pressure label
located on the inside of the fuel filler flap.The tire inflation pressure should be checked
regularly and should only be adjusted on cold
tires. Follow tire manufacturer’s maintenance
recommendation included with vehicle.
iThe following pages also list the approved
wheel rim and tire sizes for equipping your
vehicles with winter tires. Winter tires are not
available as standard or optional factory equip-
ment, but can be purchased from an authorized
Mercedes-Benz Light Truck Center.
Depending on vehicle model and the standard or
optional factory-equipped wheel rim/tire
configuration on your vehicle, equipping your
vehicle with winter tires approved for your
vehicle model may also require the purchase of
two or four wheel rims of the recommended size
for use with these winter tires. See an authorized
Mercedes-Benz Light Truck Center for more
information.

426 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 must 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 flammable 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 engine’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 3 000 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.

442 Index
Loss of Service and Warranty Information
Booklet 411
Low beam headlamps
Messages in display 356
Replacing bulbs 378
LOW RANGE - ABS 90
Lowering
Vehicle 394
Lubricants
Technical data 422
M
Main dimensions 420
Maintenance 311
Maintenance service
Basic service (Service A) 311
Calling up the maintenance service
indicator display 313
Extended service (Service B) 311
Overdue 313
Types 313
When due 311
Maintenance service indicator
Calling up 313
Clearing 313
Maintenance service indicator display
Calling up 313Maintenance service indicator
message 311
Clearing 312
Malfunction
Displaying 145
Rear Parking Assist 203
Manual headlamp mode 118
Manual operation
Interior lighting control 126
Manual operations
Fuel filler flap 372
Locking the vehicle 371
Tilt/sliding sunroof 374
Unlocking gear selector lever 373
Unlocking the driver’s door 370
Unlocking the tailgate 371
Maximum load rating 305
Maximum loaded vehicle weight 305
Maximum tire inflation pressure 305
Mechanical key 370
Removing 370Memory function 114
Recalling positions from
memory 115
Storing exterior rear view mirror
parking position 116
Storing key dependent settings 115
Menus 135
Audio 141
In control system 136, 137, 139
NAVI 144
Standard display 140
Submenus 135
TEL 159
Trip computer 157
Vehicle status message memory 144
Messages in the multifunction
display 338
Symbol messages 344–365
Text messages 340–343
Middle tunnel
Fuse box in 407
Miles/kilometers in speedometer
Setting 149

446 Index
R
Radio
Satellite (USA only) 142
Selecting stations 141
Radio transmitters, control and
operation 261
Range (distance to empty)
Calling up 158
Range of sensors
Rear Parking Assist 201
Reading lamp 32
Rear axle differential lock
Switching on 176
Rear door window
Blocking operation 86
Rear fog lamp
Messages in display 357
Replacing bulbs 386
Rear interior lamps 126
Rear lamps
Replacing bulbs 378
Rear lamps see Tail lampsRear Parking Assist 200
Cleaning sensors 318, 319
Malfunction 203
Monitoring reach 201
Warning indicators 202
Rear seat bench
Split 206
Rear seat head restraints
Installing 111
Removing 111
Rear towing eye 404
Rear view camera 203
Rear view mirror auto-dimming 177
Rear view mirrors see Mirrors
Rear window defroster 181
Activating 181
Deactivating 181
Rear window wiper
Intermittent wipe 60
Rear window wiper/washer 60
Recommended tire inflation
pressure 306
Reconnecting
Vehicle battery 398
Recovery services, Stolen vehicle (Tele
Aid) 236Refrigerant
Air conditioning 425
Refueling 264
Regular checks 265
Reinstalling
Vehicle battery 398
Remote control
SmartKey 100
Remote door unlock, Tele Aid* 235
Removing
Cargo compartment cover blind 214
Vehicle battery 398
Wheel 393
Wiper blades 388
Removing mechanical key 370
Replacing
Brake lamp bulbs 378
Bulbs 377
Front lamp bulbs 380
Rear lamp bulbs 385
SmartKey batteries 376
Wiper blades 388