2008 MERCEDES-BENZ G55AMG display

267
Operation
Engine compartment
 Engine compartment
Hood
Opening
Warning!G
Do not pull the release lever while the vehi-
cle is in motion. Otherwise the hood could
be forced open by passing air flow.
This could cause the hood to come loose
and injure you and others.
Warning!G
If you see flames or smoke coming from the
engine compartment, or if the coolant tem-
perature display indicates that the engine is
overheated, do not open the hood. Move
away from vehicle and do not open the hood
until the engine has cooled. If necessary,
call the fire department.
Warning!G
You could be injured when the hood is open
– even when the engi ne is switched off.
Parts of the engine can become very hot. To
prevent burns, let the engine cool off com-
pletely before touching any components on
the vehicle. Comply with all relevant safety
precautions.
Warning!G
To help prevent personal injury, stay clear of
moving parts when the hood is open and the
engine is running.
The radiator fan may continue to run for
approximately 30 seconds or even restart
after the engine has b een turned off. Stay
clear of fan blades.
Warning!G
The engine is equipped with a transistorized
ignition system. Becaus e of the high voltage,
it is dangerous to touch any components
(ignition coils, spark plug sockets,
diagnostic socket) of the ignition system

with the engine running

while starting the engine

if ignition is “on” and the engine is
turned manually
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270 Operation
Engine compartment
Checking engine oil level with the
control system
When checking the oil level

the vehicle must be parked on level
ground

with the engine at operating tempera-
ture, the vehicle must have been sta-
tionary for at least 5 minutes with the
engine turned off

with the engine not at operating tem-
perature yet, the vehicle must have
been stationary for at least 30 minutes
with the engine turned off
To check the engine oil level via the
multifunction display, do the following:
Switch on the ignition (page 39).
The standard display (
page 140)
should appear in the multifunction
display.
Press button k orj on the
multifunction steering wheel until the
following message appears in the
multifunction display:
One of the following messages will
subsequently appear in the multi-
function display:

Engine oil
level
OK

Add
1.0 qt
to reach
maximum
oil level
(Canada: 1.0 liter)

Add
1.5 qts
to reach
maximum
oil level
(Canada: 1.5 liters)

Add
2.0 qts
to reach
maximum
oil level
(Canada: 2.0 liters)
iIf you want to interrupt the checking
procedure, press button k orj on the
multifunction steering wheel.
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271
Operation
Engine compartment
If necessary, add engine oil
(
page 273).
For more information on engine oil, see the
“Technical data” section (
page 421) and
(
page 423).
Other display messages
If the SmartKey is not turned to position 2
in the starter switch, the following
message will appear:
Switch
ignition on to
check engine
oil level
Switch on the ignition (page 39).
If you see the message:
Observe
waiting time
If the engine is at operating
temperature, wait 5 minutes before
repeating check procedure.
If the engine is not at operating
temperature yet, wait 30 minutes
before repeating check procedure.
If you see the message:
Engine oil
level
Not with
engine on
Turn off the engine.
If the engine is at operating
temperature, wait 5 minutes before
checking oil.
If the engine is not at operating
temperature yet, you must wait
30 minutes before checking oil.
If there is excess engine oil with the engine
at operating temperature, the following
message will appear:
Engine oil
level
Reduce oil
level
Have excess oil siphoned or drained
off. Contact an authorized
Mercedes-Benz Light Truck Center.
For more information on messages in the
multifunction display concerning engine
oil, see the “Practical hints” section
(
page 349).
!Excess oil must be siphoned or drained off.
It could cause damage to the engine and/or
catalytic converter not covered by the
Mercedes-Benz Limited Warranty.
iG 500 only:
Perform the engine oil level check with the oil
dipstick if it cannot be completed with the
control system (
page 272).
In this case we recommend that you have the
system checked at a Mercedes-Benz Light Truck
Center.
W463.boo Seite 271 Montag, 19 . November 2007 8:41 08

272 Operation
Engine compartment
Checking engine oil level with the oil
dipstick (G 500 only)
When checking the oil level

the vehicle must be parked on level
ground

with the engine at operating
temperature, the vehicle must have
been stationary for at least 5 minutes
with the engine turned off

with the engine not at operating
temperature yet, the vehicle also must
have been stationary for at least
5 minutes with the engine turned off
Open the hood (page 267).1
Oil dipstick
2 Upper mark
3 Lower mark
Pull out oil dipstick 1.
Wipe oil dipstick 1 clean.
Fully insert oil dipstick 1 into the
dipstick guide tube.
Pull out oil dipstick 1 again after
approximately 3 seconds to obtain
accurate reading.
The oil level is correct when it is
between lower mark 3 (min.) and
upper mark 2 (max.) of the oil
dipstick.
If necessary, add engine oil
(
page 273).
For more information on engine oil, see the
“Technical data” section (
page 421) and
(
page 423).
For more information on messages in the
multifunction display concerning engine
oil, see the “Practical hints” section
(
page 349).
iThe filling quantity between the upper and
lower marks on the oil dipstick is approximately
2.1 US qt (2.0 l).
W463.boo Seite 272 Montag, 19 . November 2007 8:41 08

274 Operation
Engine compartment
Coolant level
The engine coolant is a mixture of water
and anticorrosion/antifreeze.
When checking the coolant level,

the vehicle must be parked on level
ground

the coolant temperature must be be-
low 158°F (70°C)The coolant expansion tank is located on
the passenger side of the engine compart-
ment.
1 Cap
Warning!G
In order to avoid any potentially serious
burns:

Use extreme caution when opening the
hood if there are any signs of steam or
coolant leaking from the cooling system,
or if the coolant temperature display
indicates that the coolant is overheated.

Do not remove pressure cap on coolant
reservoir if coolant temperature is
above 158°F (70°C). Allow engine to
cool down before removing cap. The
coolant reservoir contains hot fluid and
is under pressure.

Using a rag, slowly open the cap
approximately 1/2turn to relieve excess
pressure. If opened immediately, scald-
ing hot fluid and steam will be blown out
under pressure.

Do not spill antifreeze on hot engine
parts. Antifreeze contains ethylene
glycol which may burn if it comes into
contact with hot engine parts.
W463.boo Seite 274 Montag, 19 . November 2007 8:41 08

290 Operation
Tires and wheels
The TPMS only functions on wheels that
are equipped with the proper electronic
sensors. It monitors the tire inflation pres-
sure, as selected by the driver, in all four
tires. A warning is issued to alert you to a
decrease in pressure in one or more of the
tires.
Tire pressure inquiries are made using the
multifunction display.The present inflation
pressures are displayed only after a few
minutes travel time.Switch on the ignition (page 39).
Press buttonj ork until the
current inflation pressures for each tire
appear in the multifunction display.
Example illustration
iPossible differences between the readings
of a tire pressure gauge of an air hose, e.g. gas
station equipment, and the vehicle’s control
system can occur. Usually the readings issued by
the control system are more precise.
iWhen the vehicle has been parked for longer
than 20 minutes, the message
Tire pressure
displayed only after driving for a few
minutes
appears in the multifunction display.
Warning!G
It is the driver’s responsibility to calibrate
the TPMS on the recommended cold infla-
tion pressure. Underinflated tires affect the
ability to steer or brake the vehicle. You
might lose control over the vehicle.
iWith a spare wheel mounted, the system
may still indicate the tire inflation pressure of the
removed road wheel for some minutes. If this
happens, keep in mind that the indicated value
where the spare wheel is mounted does not
reflect the actual spare tire inflation pressure.
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292 Operation
Tires and wheels
Tire inflation pressure warnings
If the system detects a significant loss of
tire inflation pressure in one or more than
one tire, a message appears in the multi-
function display.
Example illustration
The respective tire is indicated by a red
rectangle. In addition, a warning signal
sounds.Restarting Advanced TPMS
The TPMS usually recognizes new refer-
ence values automatically, for example
when you have

adjusted the tire inflation pressure

changed wheels or tires

mounted new wheels or tires
USA only: When the malf
unction indicator is
illuminated, the system may not be able to
detect or signal low tire pressure as
intended.
USA only: Advanced TPMS malfunctions
may occur for a variety of reasons, including
the installation of replacement or alternate
tires or wheels on the vehicle that prevent
the Advanced TPMS from functioning prop-
erly. Always check the Advanced TPMS mal-
function telltale after replacing one or more
tires or wheels on your vehicle to ensure
that the replacement or alternate tires and
wheels allow the Advanc ed TPMS to contin-
ue to function properly.
iOperating radio transmission equipment
(e.g. wireless headsets, two-way radios) in or
near the vehicle could cause the Advanced
TPMS to malfunction.
Warning!G
It is the driver’s responsibility to calibrate
the TPMS on the recommended cold infla-
tion pressure. Underinflated tires affect the
ability to steer or brake the vehicle. You
might lose control over the vehicle.

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293
Operation
Tires and wheels
If you want to set new reference values
manually:
Using the Tire and Loading Information
placard on the driver’s door B-pillar
(
page 280) or, if available, the
supplemental tire inflation pressure
information on the inside of the fuel
filler flap (
page 264), make sure the
tire inflation pressure of all four tires is
correct.
Press button è orÿ on the mul-
tifunction steering wheel repeatedly
until the standard display menu
appears in the multifunction display.
Press button j ork repeatedly
until you see the current inflation
pressures for each tire appear in the
multifunction display or the following
message appears in the multifunction
display:
Tire pressure
displayed
only after
driving for
a few minutes
Press the reset button (page 130).
The following message will appear in
the multifunction display:
Restart
tire pressure
monitor?
Press the æ button.
The following message will appear in
the multifunction display:
Tire pressure
monitor
restarted
After driving a few minutes the system
verifies that the cu rrent tire inflation
pressures are within the system’s
specified range. Afte rwards the current
tire inflation pressures are accepted as
reference pressures and then moni-
tored.
If you wish to cancel activation:
Press the ç button.
iRestart the TPMS after adjusting the tire in-
flation pressure to the inflation pressure recom-
mended for the vehicle operating condition. Tire
pressure should only be adjusted on cold tires.
Observe the recommended tire inflation pres-
sure on the Tire and Loading Information placard
on the driver’s door B-pillar (
page 280). 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 inside of the fuel filler flap
(
page 264).
W463.boo Seite 293 Montag, 19 . November 2007 8:41 08