2004 MERCEDES-BENZ G55AMG check engine

ContentsAt the gas station............................... 224
Refueling ...................................... 224
Check regularly and before
a long trip ..................................... 225
Engine compartment.......................... 227
Hood ............................................ 227
Engine oil...................................... 228
Transmission fluid level ................ 232
Coolant level ................................ 232
Windshield/rear window washer
system and headlamp cleaning
system.......................................... 234
Battery ............................................... 235
Tires and wheels ................................ 236
Important guidelines .................... 236
Life of tire ..................................... 237
Direction of rotation ..................... 237
Checking tire inflation pressure ... 237
Rotating wheels............................ 238
Winter driving..................................... 240
Winter tires................................... 240
Block heater (Canada only) .......... 240
Snow chains ................................. 241Maintenance ...................................... 242
Clearing the service indicator ...... 242
Service term exceeded ................ 242
Calling up the service indicator .... 243
Resetting the service indicator..... 243
Vehicle care ....................................... 244
Cleaning and care of the vehicle .. 244
Practical hints.................................. 251
What to do if … .................................. 252
Lamps in instrument cluster ........ 252
Lamp in center console ................ 259
Messages in the multifunction
display.......................................... 260
Where will I find ...? ........................... 283
First aid kit ................................... 283
Vehicle tool kit ............................. 283
Vehicle jack.................................. 284
CD changer .................................. 284
Spare wheel ................................. 285Unlocking/locking in an emergency .. 287
Unlocking the vehicle................... 287
Locking the vehicle ...................... 288
Changing batteries in
the SmartKey ............................... 288
Fuel filler flap ............................... 290
Manually unlocking the
transmission gear selector lever .. 290
Opening/closing in an emergency .... 292
Sliding/pop-up roof ..................... 292
Brush guard* ..................................... 293
Lowering and raising brush guard 294
Replacing bulbs ................................. 295
Bulbs ............................................ 295
Replacing bulbs for front lamps ... 297
Replacing bulbs for rear lamps .... 301
Replacing wiper blades ...................... 304
Removing wiper blades ................ 304
Installing wiper blades ................. 305
Flat tire .............................................. 306
Preparing the vehicle ................... 306
Mounting the spare wheel ........... 307

33 Getting started
Unlocking
Starter switch positionsStarter switch0For removing SmartKey
The steering is locked when the
SmartKey is removed from the starter
switch. If necessary, move steering
wheel slightly to allow the locking
mechanism to engage.
1Power supply to some electrical con-
sumers, such as seat adjustment
2Ignition (power supply for all electrical
consumers) and driving position
3Starting position
Warning!
G
When leaving the vehicle, always remove the
SmartKey from the starter switch and lock
the vehicle. Do not leave children unattend-
ed in the vehicle, or with access to an un-
locked vehicle. Unsupervised use of vehicle
equipment may cause an accident and/or
serious personal injury.iThe SmartKey can only be removed
from the starter switch with the gear
selector lever in positionP.
!If the SmartKey cannot be turned, the
battery may not be sufficiently
charged.

Check the battery and charge it if
necessary (
page 311).


Get a jump start (
page 313).
To prevent accelerated battery dis-
charge and a possible dead battery, al-
ways remove the SmartKey from the
starter switch when the engine is not in
operation.

50 Getting startedDrivingProblems while driving
The engine runs erratically and misfires

An ignition cable may be damaged.


The engine electronics may not be op-
erating properly.


Unburned gasoline may have entered
the catalytic converter and damaged it.

Give very little gas.

Have the problem repaired by an au-
thorized Mercedes-Benz Light Truck
Center as soon as possible.The coolant temperature is over 248°F
(120°C)
The coolant is too hot and is no longer
cooling the engine.

Stop the vehicle as soon as possible
and turn off the engine. Allow engine
and coolant to cool down.

Check the coolant level and add cool-
ant if necessary (
page 232).In case of accident
If the vehicle is leaking gasoline:

Do not start the engine under any cir-
cumstances.

Notify local fire and/or police authori-
ties.
If the extent of the damage cannot be de-
termined:

Notify an authorized Mercedes-Benz
Light Truck Center.
If no damage can be determined on the


major assemblies


fuel system


engine mount

Start the engine in the usual manner.
iExcessive coolant temperatures trigger
a warning message in the multifunction
display (
page 269).

57 Safety and Security
Occupant safety
A malfunction in the system has been de-
tected if the 1 indicator lamp:

fails to extinguish after approximately
four seconds.


does not come on at all.


comes on after the engine was started
or while driving.
For safety reasons, we strongly recom-
mend that you visit an authorized
Mercedes-Benz Light Truck Center imme-
diately to have the system checked.
For more information, see “Practical hints”
(
page 258).
Airbags
Warning!
G
In the event that the 1indicator lamp
comes on during driving or does not come
on at all, the SRS may not be operational.
For your safety, we strongly recommend
that you visit an authorized Mercedes-Benz
Light Truck Center immediately to have the
system checked; otherwise the SRS may not
be activated when needed in an accident,
which could result in serious or fatal injury,
or it might deploy unexpectedly and unnec-
essarily which could also result in injury.
Improper work on the restraint systems, in-
cluding incorrect installation and removal,
can lead to possible injury through an unin-
tended activation of the SRS.
In addition, through improper work there is
a risk of rendering the SRS inoperative or
causing unintended airbag deployment.
Work on the SRS must therefore only be per-
formed by qualified technicians. Contact an
authorized Mercedes-Benz Light Truck Cen-
ter.
Warning!
G
Airbags are designed to reduce the potential
of injury in certain frontal (front airbags) im-
pacts, which may cause significant injuries.
However, no system available today can to-
tally eliminate injuries and fatalities.
The activation of the SRS temporarily releas-
es a small amount of dust from the airbags.
This dust, however, is neither injurious to
your health, nor does it indicate a fire in the
vehicle. The dust might cause some tempo-
rary breathing difficulty for people with asth-
ma or other breathing trouble. To avoid this,
you may wish to get out of the vehicle as
soon as it is safe to do so. If you have any
breathing difficulty but cannot get out of the
vehicle after the airbag inflates, then get
fresh air by opening a window or door.

119 Controls in detail
Control system
Menus, submenus and functions
Menu1
Menu2
Menu3
Menu4
Menu5
Menu6
Menu7
Standard
display
AUDIO
NAVI
Malfunction
memory
Settings
Trip computer
Telephone
Commands/submenuCoolant
temperature
display
Select radio
station
Activate route
guidance
Call up
malfunction
messages
Reset to factory
settings
Fuel
consumption
statistics after
start
Load phone book
Digital
speedometer
Operate CD
player
Instrument
cluster submenu
Fuel
consumption
statistics since
the last reset
Search for name
in phone book
Call up FSS
Lighting
submenu
Call up range
Check engine oil
level
Vehicle submenuConvenience
submenu

120 Controls in detailControl system
Standard display menu
You can select the functions in the stan-
dard display menu with buttonk
orj.
The following functions are available:
Display digital speedometer
Press buttonj twice.
The current vehicle speed is shown in
the multifunction display.
AUDIO menu
The functions in the
AUDIO
menu operate
the audio equipment which you currently
have turned on.
If no audio equipment is currently turned
on, the message
AUDIO OFF
is shown in the
display.
The following functions are available:
iThe headings used in the menus table
are designed to facilitate navigation
within the system and are not neces-
sarily identical to those shown in the
control system displays.
The first function displayed in each
menu will automatically show you
which part of the system you are in.
Function
Page
Call up coolant temperature
display
112
Call up digital speedometer
120
Call up FSS
242
Check engine oil level
229
Function
Page
Select radio station
121
Operate CD player
121

144 Controls in detailAutomatic transmission
Accelerator position
Your driving style influences the transmis-
sion’s shifting behavior:
Less throttle Earlier upshifting
More throttle Later upshifting
Kickdown
Use kickdown when you want maximum
acceleration.
Press the accelerator past the point of
resistance.
The transmission shifts into a lower
gear.

Ease on the accelerator when you have
reached the desired speed.
The transmission shifts up again.Emergency operation (Limp Home
Mode)
If vehicle acceleration worsens or the
transmission no longer shifts, the trans-
mission is most likely operating in limp
home (emergency operation) mode. In this
mode, only 2nd gear and reverse gear can
be activated.
Stop the vehicle.

Move gear selector lever toP.

Turn off the engine.

Wait at least ten seconds before re-
starting.

Restart the engine.

Move gear selector lever to positionD
(for second gear) orR.

Have the transmission checked at an
authorized Mercedes-Benz Light Truck
Center as soon as possible.
Warning!
G
When leaving the vehicle, always remove the
SmartKey from the starter switch, and lock
the vehicle. Do not leave children unattend-
ed in the vehicle, or with access to an un-
locked vehicle. Children could move the
gear selector lever from positionP, which
could result in an accident and/or serious
personal injury.

162 Controls in detailClimate controlDeactivating the climate control system
Deactivating
Set the air volume control switch to
position0.
Reactivating

Set the air volume control switch to any
speed.
Air conditioning
The air conditioning is operational while
the engine is running and cools the interior
air to the temperature set by the operator.
Deactivating
It is possible to deactivate the air condi-
tioning (cooling) function of the climate
control system. The air in the vehicle will
then no longer be cooled or dehumidified.
Press button°.
The indicator lamp on the button°
comes on.Activating
Moist air can fog up the windows. You can
dehumidify the air with the air conditioner.

Press button° again.
The indicator lamp on the button°
goes out.
The air conditioner uses the refrigerant
R134a. This refrigerant is free of CFCs
which are harmful to the ozone layer.
iCondensation may drip out from under-
neath the vehicle. This is normal and
not an indication of a malfunction.
!If the° button on the climate con-
trol panel starts to blink, this indicates
that the air conditioner is losing refrig-
erant. The compressor has turned itself
off. The air conditioner cannot be
turned on again.

Have the air conditioner checked at
the nearest authorized
Mercedes-Benz Light Truck Center.