2008 MERCEDES-BENZ G-CLASS SUV oil pressure

Exterior view
19Function Page
1
Opening and closing the
rear door 56
Cabriolet: opening and
closing the tailgate
58
2
Reversing camera* 119
3
Rear window heating 128
4
Rear lights 240
5
Fuel filler flap 154
6
Opening and closing the
doors 54 Function Page
7
Exterior mirrors 68
Parking position 69
8
Front lights 237
9
Opening the bonnet 157
Engine oil 159
Coolant
161 Function Page
a
Windscreen wiper opera-
tion
82
Cleaning the wiper blades 183
Replacing the wiper blades 242
b
Cleaning the windows 184
c
Tyres and wheels 266
Tyre pressure monitor* 165
Flat tyre, fitting the spare
wheel
244
d
Towing eyes 253At a glance
* optional
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On-board computer
100 Function
1
Operation
menu (Ypage 100)
R trip meter and total distance
recorder (standard display)
(Y page 101)
R tyre pressure moni-
tor*(Y page 165)
R digital speedometer or outside tem-
perature (Y page 101)
R ASSYST service display
(Y page 181)
R engine oil level* (Y page 159) 2
Audio/DVD*
menu (Ypage 101)
R radio station (Y page 101)
R audio drive or
media* ( Ypage 102)
R DVD video* (Y page 102) 3
Navigation* menu (NAV)
(Y
page 103) 4
Message memory
menu9
(fault and
warning messages) (Y page 103) Function
5
Settings
menu (Ypage 104)
R resetting to factory settings
(Y page 104)
R selecting submenus (Y page 104) 6
Trip computer
menu (Ypage 110)
R consumption statistics
(Y page 110)
R range (Y page 111) 7
Telephone* menu (Y
page 111) This is what the displays look like when you
scroll through the menus.
The generic terms in the table overview are
intended to help you navigate through the
menus. The terms themselves are not always
displayed in the multi-function display.
For the Audio 20 CD, the on-board computer
displays the
AudioandTelephone* menus
in English. The language for these menus is
not dependent on the language selected for
the multi-function display.
The display messages in the AudioandTele-
phone* menus are slightly different in vehi- cles with Audio 20 CD and COMAND APS*.
The examples given in this Owner's Manual
apply to vehicles equipped with COMAND
APS*. Operation menu
Use the buttons on the multi-function steer-
ing wheel.
X Press the èor· button to select the
standard display.
i Menu overview: see ( Ypage 99).
You can select the following functions in the
Operation menu by pressing the jor
k button:
R Trip meter and total distance recorder
(standard display)
R Tyre pressure monitor* (Y page 165)
R digital speedometer or outside tempera-
ture (Y page 101)
R ASSYST service display (Y page 181)
R Engine oil level* (Y page 159)
9 This menu is only visible if there is a display message available. Controls
* optional
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Engine compartment
161G 320 CDI
1
Cap
X Unscrew cap 1and remove it.
X Top up with the amount of oil required.
! Do not add too much oil. If too much oil
is added and the oil level is above the max-
imum mark on the dipstick, the engine or
catalytic converter could be damaged.
Have excess oil siphoned off.
X Screw cap 1onto the filler neck. H
Environmental note
When topping up the oil, take care not to
spill any. Oil must not be allowed to escape
into the soil or waterways. You would oth-
erwise be damaging the environment. Oil level in the automatic transmis-
sion
There is no need for you to check the oil level
in the automatic transmission. In the event of
oil loss or problems with gearshifts, have the
automatic transmission checked at a quali-
fied specialist workshop, e.g. at a Mercedes-
Benz Service Centre. Coolant
G
Risk of injury
The cooling system is pressurised. There-
fore, only unscrew the cap once the engine
has cooled down. This means the coolant
temperature gauge must display less than
70 °C. You could otherwise be scalded by
escaping hot coolant.
Coolant consists of water and antifreeze/cor-
rosion inhibitor. Only check the coolant level
when the vehicle is on a level surface and the
engine has cooled down. Checking the coolant level The expansion tank is located in the engine
compartment on the right-hand side of the
vehicle when viewed in the direction of travel.
1
Cap
X Slowly turn cap 1by half a turn in the
direction of the arrow to release excess
pressure.
X Unscrew cap 1completely and remove it.
X Turn cap 2further anti-clockwise and
remove it.
There is sufficient coolant in the expansion
tank if the coolant is level with the mark in
the expansion tank when the coolant is cold
or approximately 1.5 cm higher when hot. Operation
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Tyres and wheels
163
!
Retreaded tyres are neither tested nor
recommended by Mercedes-Benz, since
previous damage cannot always be detec-
ted on retreaded tyres. As a result,
Mercedes-Benz cannot guarantee vehicle
safety if retreaded tyres are fitted. Do not
fit used tyres if you have no information
about their previous usage. G
Risk of accident
If wheels or tyres other than those which
have been tested are fitted:
R the brakes or chassis components could
be damaged.
R wheel and tyre clearances can no longer
be guaranteed.
This could cause an accident.
Modification work on the brake system and
wheels is not permitted, nor is the use of
spacer plates or brake dust shields. This inva-
lidates the General Operating Permit for the
vehicle. Notes on selecting, fitting and replacing
tyres R
only fit tyres and wheels of the same type
and make.
R only fit tyres of the correct size onto the
wheels.
R after fitting new tyres, run them in at mod-
erate speeds for the first 100 km as they
only reach their full performance after this
distance.
R fit new tyres on the front wheels first if tyres
of the same size are required on the front
and rear wheels.
R replace the tyres after six years at the lat-
est, regardless of wear. This also applies to
the spare wheel.
R do not drive with tyres which have too little
tread depth, as this significantly reduces
the traction on wet roads (aquaplaning).
! Store tyres that are not being used in a
cool, dry and preferably dark place. Protect
the tyres against oil, grease, petrol and die-
sel. Notes on regularly inspecting wheels
and tyres R
regularly check the wheels and tyres of
your vehicle for damage (e.g. cuts, punctu-
res, tears, bumps on tyres and deforma-
tion, cracks or severe corrosion on wheels),
at least every 14 days, as well as after driv-
ing off-road or on rough roads. Damaged
wheels could cause a loss of tyre pressure.
R regularly check the tyre tread depth and the
condition of the tread across the whole
width of the tyre (Y page 164). If neces-
sary, turn the front wheels to full lock in
order to inspect the inner side of the tyre
surface.
R all wheels must have a valve cap to protect
the valve against dirt and moisture.
R regularly check the pressure of all your
tyres including the spare tyre, particularly
prior to long trips, and correct the pressure
as necessary (Y page 164).
Notes on driving R
while driving, pay attention to vibrations,
noises and unusual handling characteris-
tics, e.g. pulling to one side. This may indi-
cate that the wheels or tyres are damaged.
If you suspect that a tyre is defective, Operation
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Off-road driving
174
i
Information about retrofitting special all-
terrain tyres is available from any
Mercedes-Benz Service Centre.
Checklist before driving off-road X
Engine oil level: check the engine oil and
top it up if necessary.
Only then does the engine receive enough
oil when the vehicle is standing on a steep
incline.
X Vehicle toolkit: check that the jack is
working and make sure you have the wheel-
brace, a robust tow cable and a folding
spade in the vehicle.
X Wheels and tyres: check the tyre tread
depth and tyre pressure.
X Check for damage and remove any objects,
e.g. small stones, from the wheels/tyres.
X Replace any missing valve caps.
X Replace dented or damaged wheels.
Checklist after driving off-road Driving over rough terrain places greater
demands on your vehicle than driving on nor-
mal roads. After driving off-road, check the
vehicle. This allows you to detect damage
promptly and reduce the risk of an accident
to yourself and other road users. X
Shift the transfer case to HIGH
(Y page 93).
X Disengage the differential locks
(Y page 95).
X Clean the headlamps and rear lights and
check for damage.
X Clean the front and rear licence plates.
X Clean the wheels/tyres with a water jet and
remove any foreign objects.
X Clean the wheels, wheel arches and the
vehicle underside with a water jet; check
for foreign objects and damage.
X Check whether twigs or other parts of
plants have become trapped. These
increase the risk of fire and can damage
fuel pipes, brake hoses or the rubber bel-
lows of the axle joints and propeller shafts.
X After the trip, examine without fail the
entire undercarriage, wheels, tyres, brakes,
bodywork structure, steering, chassis and
exhaust system for damage.
X After driving for extended periods across
sand, mud, gravel, water or in similarly dirty
conditions, have the brake discs, wheels,
brake pads /linings and axle joints checked
and cleaned.
X If you detect strong vibrations after off-road
travel, check for foreign objects in the
wheels and drive train and remove them if necessary. Foreign objects can disturb the
balance and cause vibrations. Travelling uphill
Approach/departure angle 1
Front approach/departure angle
2 Rear approach/departure angle
The table shows approach and departure
angles 1and 2at maximum load. This
information only provides an indication. The
approach and departure angles vary accord-
ing to the vehicle tyres and optional equip-
ment. Operation
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Care
186car wash. Do not use sharp-edged equip-
ment to remove ice and snow.
! Never use any of the following to clean the
soft top:
R petrol
R thinner
R tar or stain remover
R other organic solvents
Cleaning the soft top
If it is only slightly dirty, you can clean the soft
top while it is dry or rinse it with clear water.
Use a brush and clear water to clean away
normal amounts of dirt. Always brush in the
direction of the cloth, from front to back.
If it is very dirty or stained, clean with a suit-
able soft-top cleaning agent and a brush.
Always brush in the direction of the cloth,
from front to back. Cleaning the ultrasonic reversing aid* 1
Sensors
X Clean sensors 1in the bumper with water,
car shampoo and a soft cloth.
! Do not use dry, rough or hard cloths and
do not scrub. You will otherwise scratch or
damage the sensors. If you clean the sen-
sors using a high-pressure cleaner or steam
cleaner, observe the manufacturer's infor-
mation on maintaining the correct distance
between the vehicle and the nozzle of the
high-pressure cleaner. Trailer coupling*
The ball coupling must be cleaned if it
becomes dirty or corroded.
X Remove any rust using a wire brush.
X Remove dirt with a clean, lint-free cloth or
a brush.
! Do not clean the ball coupling with a high-
pressure cleaner. Do not use solvents. 1
Ball neck head
X After cleaning, lightly oil or grease ball cou-
pling 1.
X Check that the vehicle's trailer coupling is
working properly. Operation
* optional
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Flat tyre
246
!
Do not place wheel bolts in sand or on a
dirty surface. This could cause damage to
the bolt and wheel hub threads.
X Remove the wheel.
Fit ting a new wheel G
Risk of accident
Replace damaged or corroded wheel bolts.
Never oil or grease wheel bolts. G
Risk of accident
If a wheel hub thread is damaged, you must
not drive the vehicle any further. Consult a
qualified specialist workshop which has the
necessary specialist knowledge and tools
to carry out the work required. Mercedes-
Benz recommends that you use a
Mercedes-Benz Service Centre or Service
24h for this purpose. In particular, work rel-
evant to safety or on safety-related systems
must be carried out at a qualified specialist
workshop. G
Risk of accident
Only use wheel bolts that have been
designed for the wheel and the vehicle. For
safety reasons, Mercedes-Benz recom- mends that you only use wheel bolts which
have been approved for Mercedes-Benz
vehicles. Other bolts could work loose.
Do not tighten the wheel bolts completely
while the vehicle is still jacked up. The vehi-
cle could topple off the jack.
X Clean the wheel and wheel hub contact
surfaces.
X Place the wheel on the wheel hub and push
it on.
X Tighten the wheel bolts until they are fin-
ger-tight.
Lowering the vehicle X
Open the pressure release screw on the
jack using the pump lever (Y page 244) by
approximatel y one turn.
X Place the jack to one side. 1
–5 Wheel bolts
X Tighten the wheel bolts evenly in a cross-
wise pattern in the sequence indica-
ted (1 to5). The tightening torque is
130 Nm . G
Risk of accident
Have the tightening torque checked imme-
diately after a wheel is changed. The wheels
could work loose if they are not tightened
to a torque of 130 Nm.
X Push the jack piston back in and close the
drain plug.
X Secure the faulty wheel by using the fas-
tening bolts to the exterior spare wheel
bracket. Practical advice
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