2003 MERCEDES-BENZ G55AMG battery

297 Practical hints
Jump starting
Jump starting
If the battery is discharged, the engine can
be started with jumper cables and the bat-
tery of another vehicle. Observe the follow-
ing:

Jump starting should only be performed
when the engine and catalytic convert-
er are cold.


Do not start the engine if the battery is
frozen. Let the battery thaw out first.


Only use 12 V battery to jump start
your vehicle. Jump starting with a more
powerful battery could damage the ve-
hicle’s electrical system, which will not
be covered by the Mercedes-Benz Lim-
ited Warranty.


Use only jumper cables with sufficient
cross-section and insulated terminal
clamps.


Always make sure that the jumper ca-
bles are not on or near pulleys, fans, or
other parts that move when an engine
is started or running.
Warning!
G
Failure to follow these directions will cause
damage to the electronic components, and
can lead to a battery explosion and severe
injury or death.
Never lean over batteries while connecting
or jump starting, you might get injured.
Battery fluid contains sulfuric acid. Do not
allow this fluid to come in contact with eyes,
skin or clothing. In case it does, immediately
flush affected area with water, and seek
medical help if necessary.
A battery will also produce hydrogen gas,
which is flammable and very explosive. Keep
flames or sparks away from battery, avoid
improper connection of jumper cables,
smoking etc.
Attempting to jump start a frozen battery
can result in it exploding, causing personal
injury.
Read all instructions before proceeding.
!Avoid repeated and lengthy starting at-
tempts.
Do not attempt to start the engine us-
ing a battery quick charge unit.
If engine does not run after several un-
successful starting attempts, have it
checked at the nearest authorized
Mercedes-Benz Light Truck Center.
Excessive unburned fuel generated by
repeated failed starting attempts may
damage the catalytic converter and
may present a fire risk.
Make sure the jumper cables do not
have loose or missing insulation.
Make sure the cable clamps do not
touch any other metal part while the
other end is still attached to a battery.!Do not tow-start the vehicle.

298 Practical hintsJump startingThe jump-start contacts are located in the
engine compartment.
Make sure that the two vehicles do not
touch.

Turn off all electrical consumers.

Apply parking brake.

Shift selector lever to positionP.

Start engine of the vehicle with the
charged battery and run at idle speed.1Cover
2Positive (+) terminal
3Negative (-) terminal

Open cover1 of the positive terminal
of both vehicles.

Connect the positive terminals2 of the
batteries with the jumper cable. Clamp
cable to discharged battery first.

Connect negative terminals3 of the
batteries with the jumper cable. Clamp
cable to charged battery first.

Start the engine of the disabled vehi-
cle.Now you can again turn on the electrical
consumers. Do not turn on the lights under
any circumstances.

Remove the jumper cables first from
negative terminals3 of the batteries
and then from positive terminals2.

Have the battery checked at the
nearest authorized Mercedes-Benz
Light Truck Center.
Warning!
G
Keep flames or sparks away from battery.
Do not smoke.
Observe all safety instructions and precau-
tions when handling automotive batteries
(page 295).

300 Practical hintsTowing the vehicleWarning!
G
With the engine not running, there is no
power assistance for the braking and steer-
ing systems. In this case, it is important to
keep in mind that a considerably higher de-
gree of effort is necessary to brake and
steer the vehicle. Adapt your driving accord-
ingly.iThe selector lever will remain locked in
positionP and the key will not turn in
the starter switch if the battery is dis-
connected or discharged. See notes on
the battery (
page 295) or on jump
starting (
page 297).
Manually unlocking of transmission se-
lector lever (page 275).
iTo signal turns while being towed with
hazard warning flasher in use, turn key
in starter switch to position2 and acti-
vate combination switch for left or right
turn signal in usual manner – only the
selected turn signal will operate.
Upon canceling the turn signal, the haz-
ard warning flasher will operate again.
!When towing the vehicle with all wheels
on the ground, note the following:
With the automatic central locking acti-
vated and the key in starter switch
position2, the vehicle doors lock if the
wheels are turning at vehicle speeds of
approx. 9 mph (15 km/h) or more.
To prevent the vehicle doors from lock-
ing, deactivate the automatic central
locking (
page 128).
Towing of the vehicle should only be
done using the towing eye. Never at-
tach tow cable, tow rope or tow rod to
vehicle chassis, frame or suspension
parts.

303 Practical hintsFuses
Fuses
The fuse box is located on the left side of
the cockpit in the passenger compart-
ment. It contains:

a fuse chart


spare fuses


a special spare extractor
Additional fuses are located in:


battery box


front passenger footwell under the
cockpit


middle tunnel
Fuse box in passenger compartment
Opening
1Cover
Open the driver’s door.

Remove cover1 in direction of arrows.
Fuse box in battery box
The battery box is located under the cover
in the rear footwell.
Replacement of fuses can only be per-
formed by a Mercedes-Benz Light Truck
Center.
iOnly install fuses that have been tested
and approved by Mercedes-Benz and
that have the specified amperage rat-
ing.
Never attempt to repair or bridge a
blown fuse. Have the cause determined
and remedied by an authorized
Mercedes-Benz Light Truck Center.

314 Technical dataElectrical system
Electrical system
G500
G55AMG
Generator (alternator)
14 V/150 A
14 V/150 A
Starter motor
12 V/1.7 kW
12 V/1.7 kW
Battery
12 V/90 Ah
12 V/90 Ah
Spark plugs
Bosch F 8 DPER
Beru 14 FGH 8 DPUR X 2
NGK PFR5R-11
Electrode gap
0.039 in (1.0 mm)
0.039 in (1.0 mm)
Tightening torque
15 – 22 ft.lb (20 – 30 Nm)
15 – 22 ft.lb (20 – 30 Nm)

328 Technical termsRemote Vehicle Diagnostics
Transmission of vehicle data and cur-
rent location to the Mercedes-Benz
Customer Assistance Center for sub-
scribers to Tele Aid service.
REST
(Residual engine heat utilization)
Feature that uses the engine heat
stored in the coolant to heat the vehi-
cle interior for a short time after the en-
gine has been turned off.
Restraint system
Seat belts, belt tensioner, airbags and
child seat restraint systems. As inde-
pendent systems, their protective func-
tions complement one another.RON
(R
esearch O
ctane N
umber)
The Research Octane Number for gaso-
line as determined by a standardized
method. It is an indication of a gaso-
line's ability to resist undesired detona-
tion (knocking). The average of both
the ->MON (Motor Octane Number)
and RON (Research Octane Number) is
posted at the pump, also known as
ANTI-KNOCK INDEX.
Shift lock
When the vehicle is parked, this lock
prevents the transmission selector le-
ver from being moved out of positionP
without key turned and brake pedal de-
pressed.
SRS
(S
upplemental R
estraint S
ystem)
Seat belts, emergency tensioning de-
vice and airbags. Though independent
systems, they are closely interfaced to
provide effective occupant protection.Tele Aid System
(T
elematic A
larm I
dentification on
D
emand)
The Tele Aid system consists of three
types of response: automatic and man-
ual emergency, roadside assistance
and information. Tele Aid is initially ac-
tivated by completing a subscriber
agreement and placing an acquain-
tance call.
The Tele Aid system is operational pro-
viding that the vehicle’s battery is
charged, properly connected, not dam-
aged and cellular and GPS coverage is
available.
Telematics*
A combination of the terms “telecom-
munications” and “informatics”.
Tightening torque
Force times lever arm (e.g. a lug
wrench) with which threaded fasteners
such as wheel bolts are tightened.

332 IndexAlarm system
Anti-theft 79
Anticorrosion/antifreeze 320
Antiglare
Automatic 147
Antilock brake system (ABS) 325
Anti-theft alarm system
Arming 79
Canceling alarm 80
Disarming 80
Anti-theft systems 79
Anti-theft alarm system 79
Tow-away alarm 80
Aquaplaning see Hydroplaning 200
Armrest
Storage compartment below 177
Storage compartment in front of 177
Ashtrays 179
At the gas station 214
ATF (automatic transmission fluid) 220
AUDIO menu 116
Selecting radio station 117
Automatic antiglare for
rear view mirror 147Automatic central locking
Activating/deactivating (control
system) 128
Automatic climate control
Deactivating 157
Automatic headlamp mode 101
Automatic lighting control
Activating 104
Deactivating 105
Automatic locking when driving 89
Automatic transmission 135
Accelerator position 139
Emergency operation
(Limp Home Mode) 140
Fluid level 220
Gear ranges 137
Gear selector lever position 138
Gear shifting malfunctions 140
Kickdown 139
Manual shifting 136
One-touch gearshifting 136
Selector lever position 135
Transmission fluid 220B
BabySmart
TM
Airbag deactivation system 65
Compatible child seats 65, 325
Self-test 66
BabySmart
TM airbag deactivation
system 325
Backup lamp
Replacing bulbs 287
Backup lamps 280
Bulbs 280
BAS 71, 73, 325
Messages in display 248
Batteries, SmartKey
Changing 273
Check lamp 85
Checking 86
Batteries, vehicle 223
Battery box
Fuse box in 303
Battery discharged
Jump starting 297

333 Index
Battery, vehicle 223, 295
Charging 295
Disconnecting 296
Messages in display 266
Reconnecting 296
Block heater 228
Blocking
Rear door window operation 69
Brake assist system (BAS) 325
Brake fluid 215, 318
Brake lamp bulbs, left and right 280
Brake lamp, high mounted 280
Brake pads
Message in display 250
Brakes 198
Warning lamp 241, 242
Break-in period 196
Brush guard* 277
Lowering 278
Bulbs, replacing
Additional turn signals 279
Backup lamp 287
Backup lamps 280
Brake lamps 280
Fog lamps 279
Front fog lamps 283Front lamps 279
Front turn signal lamps 284
High and low beam 279
High beam lamps 281
High mounted brake lamp 280
License plate lamps 280, 288
Low beam lamps 281
Parking lamps 279, 280, 281
Rear fog lamp 287
Side marker lamps 279, 285
Standing lamps 279, 280, 281
Tail lamp assemblies 280, 286
Turn signal lamp, side 284
Turn signal lamps 279, 280
C
CAC (Customer Assistance Center) 325
Calling up
Range (distance to empty) 131
Service indicator 231
CAN system 325
Capacities
Fuels, coolants, lubricants, etc. 316
Cargo area cover 168
Installing 169
Removing 169Cargo area see Cargo compartment 87, 88
Cargo compartment
Tailgate 87, 88
Tie-down rings 175
Cargo tie-down rings 175
Catalytic converter 211
CD player
Operating 117
Center console 27
AIRBAG OFF indicator lamp 244
Lower part 28
Upper part 27
Centigrade
Setting temperature units 122
Central locking
From inside 89
Switch 89
Switching on/off (control system) 128
Unlocking from inside 89
Central locking switch 89
Certification label 310
Changing
Batteries (SmartKey) 273
Key setting 128
Charging
Vehicle battery 295