engine MERCEDES-BENZ G-CLASS SUV 2008 Repair Manual
[x] Cancel search | Manufacturer: MERCEDES-BENZ, Model Year: 2008, Model line: G-CLASS SUV, Model: MERCEDES-BENZ G-CLASS SUV 2008Pages: 293, PDF Size: 4.49 MB
Page 179 of 293
Off-road driving
176 Driving over obstacles
Observe the following rules when driving over
tree stumps, large stones and other obsta-
cles:
R shift the transfer case to
LOW (Ypage 92).
R avoid high engine speeds.
R select shift range 1.
R drive very slowly.
R try to drive straight over the centre of
obstacles: front wheel first, then rear
wheel.
! Obstacles could damage the floor of the
vehicle or components of the chassis. Ask
passengers for guidance when driving over
large obstacles. Any damage to the vehicle
always increases the risk of an accident. Fording
The fording depth must not exceed 50 cm
when the vehicle is loaded and ready to drive.
Loaded and ready to drive means: a full tank,
all fluids topped up and the driver is in the
vehicle.
!
The depth of water must not exceed
50 cm. Note that the possible fording depth
is less in flowing water.
R Establish how deep the water is and the
characteristics of the body of water before
fording.
R Deactivate the auxiliary heat-
ing* (Y page 130).
R Shift the transfer case to
LOW (Ypage 92). R
Engage the differential locks, if necessary
(Y page 94).
R Restrict the shift range to 1or 2.
R Avoid high engine speeds.
R Enter and exit the water at a flat place and
at a steady walking pace.
! Under no circumstances should you
accelerate before entering the water. The
bow wave could cause water to enter and
damage the engine and neighbouring
assemblies.
R Drive slowly and at an even speed through
the water.
R Do not stop.
! Do not open any of the vehicle’s doors
while fording. Otherwise, water could get
into the vehicle interior and damage the
vehicle’s electronics and interior equip-
ment.
R Water offers a high degree of resistance,
and the ground is slippery and in some
cases unstable. Therefore, it is difficult and
dangerous to pull away in the water.
R Ensure that a bow wave does not form as
you drive. Operation
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Driving ab
road 177
R
Clean an y mud from the tyre tread after
crossing a ford.
R Apply the brakes to dry them after crossing
a ford. Driving on sand
Observe the following rules when driving on
sand:
R shift the transfer case to
LOW (Ypage 92).
R avoid high engine speeds.
R select a shift range appropriate to the ter-
rain.
R drive quickly to overcome the rolling resist-
ance. Otherwise, the vehicle could dig itself
into the sand.
R drive in the tracks of other vehicles, if pos-
sible. Make sure that the ruts are not too
deep, that the sand is firm enough and that
your vehicle has sufficient ground clear-
ance. Ruts
Observe the following rules when driving
along ruts in off-road terrain or on roads with
loose gravel:
! Check that the ruts are not too deep and
that your vehicle has sufficient clearance.
Otherwise, your vehicle could be damaged
or bottom out and get stuck.
R shift the transfer case to
LOW (Ypage 92).
R avoid high engine speeds.
R select shift range 1.
R drive slowly.
R where ruts are too deep, drive with the
wheels on one side on the middle section
of the road if possible. Driving abroad
Points to remember
An extensive Mercedes-Benz Service network
is also available in other countries. You can
obtain the relevant workshop directories
from any Mercedes-Benz Service Centre.
Only low-octane fuel is available in certain
countries.
You can find further information about fuel
grades on (Y page 154). Symmetrical dipped beam
If your journey takes you to countries where
vehicles are driven on the opposite side of the
road to the country in which the vehicle is
registered, your headlamps must be switched
to symmetrical dipped beam. Oncoming traf-
fic will be dazzled less. G
Risk of injury
Xenon bulbs are under high voltage. You
could get an electric shock and be seriously
or even fatally injured if you touch the elec-
tric contacts on xenon bulbs. Therefore, do
not, remove the cover on xenon bulbs.
Do not change xenon headlamps yourself,
but have them replaced at a qualified spe- Operation
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Page 182 of 293
Trailer towing*
179
Coupling up a trailer G
Risk of injury
Do not connect a trailer with an engaged
overrun brake. Otherwise, your hand could
become trapped between the bumper and
drawbar.
! Do not uncouple a trailer with overrun
brake between the bumper and drawbar,
otherwise your vehicle could be damaged
by the spring action of the overrun brake.
X Position the trailer level behind the vehicle.
X Couple up the trailer.
X Establish the electrical connection
between the vehicle and the trailer.
Driving tips In Germany, the maximum permissible speed
for vehicle/trailer combinations is 80 km/h.
! A maximum speed of 80 km/h should not
be exceeded, even in countries where
higher speeds are permitted for vehicle/
trailer combinations.
When towing a trailer, your vehicle's handling
characteristics will be different in comparison
to when driving without a trailer. The vehicle/trailer combination:
R
is heavier
R is restricted in its acceleration and gradi-
ent-climbing capability
R has an increased braking distance
R is affected more by strong crosswinds
R demands more sensitive steering
R consumes more fuel
X On long and steep downhill gradients,
select shift range 1,2or 3in good time.
i This also applies if you have activated
cruise control or Speedtronic.
X If necessary, shift the transfer case to
LOW (Ypage 92).
This will use the braking effect of the
engine, so less braking will be required to
maintain the speed. This relieves the load
on the brake system and prevents the
brakes from overheating and wearing too
quickly. If you need additional braking,
depress the brake pedal repeatedly rather
than continuously. G
Risk of accident
Never depress the brake pedal continu-
ously while the vehicle is in motion, e.g. never cause the brakes to rub by applying
constant slight pedal pressure. This causes
the brake system to overheat, increases
the braking distance and can lead to the
brakes failing completely.
Driving tips
R Maintain a greater distance from the vehi-
cle in front than when driving without a
trailer.
R Avoid braking abruptly. If possible, brake
gently at first to allow the trailer to run on.
Then increase the braking force rapidly.
R The values given for gradient-climbing
capabilities from a standstill refer to sea
level. When driving in mountainous areas,
note that the power output of the engine,
and consequently the vehicle's gradient-
climbing capability, decrease with increas-
ing altitude.
If the trailer swings from side to side:
X Do not accelerate.
X Do not counter-steer.
X Brake if necessary. Operation
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Care
182
X
Switch on the ignition.
X Press the èorÿ button to select the
standard display (Y page 101).
X Press the jork button to select the
service information.
The 9 or½ service symbol and the
service due date are displayed. Fuel/water separator*
If the fuel/water separator needs servicing,
the following message appears in the multi-
function display: You will also hear a brief warning tone.
X Consult a qualified specialist workshop,
e.g. a Mercedes-Benz Service Centre, as
soon as possible. !
If you continue driving without having the
fuel/water separator serviced, this could
cause damage to the engine. Any resulting
damage is not covered by the warranty. H
Environmental note
Dispose of service products in an environ-
mentally-responsible manner. Care
Notes on care
Regular and proper care maintains the value
of your vehicle.
i It is advisable to use Mercedes-Benz care
products.
Scratches, corrosive deposits, areas affected
by corrosion and damage caused by inade-
quate care cannot always be completely
repaired. In such cases, visit a qualified spe-
cialist workshop immediately, e.g. a
Mercedes-Benz Service Centre.
Repair damage caused by loose chippings
and remove the following substances imme-
diately, whilst avoiding rubbing too hard:
R Soak insect remains with insect remover
and rinse off afterwards.
R Soak bird droppings with water and rinse
off afterwards.
R Remove tree resin, oils, fuels and greases
by rubbing gently with a cloth soaked in
petroleum ether or lighter fluid.
R Use silicone remover to remove wax.
R Use tar remover to remove tar stains. Operation
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Where will I find...?
188 Where will I find...?
Warning triangle, first-aid kit and
vehicle tool kit
G
Risk of injury
The jack is designed only to raise and hold
the vehicle for a short time while a wheel
is being changed.
You must use axle stands if you are carrying
out work on the vehicle.
Make sure that the jack is placed on a firm,
non-slip, level surface. Do not use wooden
blocks or similar objects as a jack underlay.
Otherwise, the jack will not be able to ach-
ieve its load-bearing capacity due to the
restricted height.
Do not start the engine at any time while a
wheel is being changed.
Do not lie under the vehicle when it is being
supported by the jack. If you do not raise
the vehicle as described, it could slip off the
jack (e.g. if the engine is started or a door
or the tailgate is opened or closed) and you
could be seriously injured.
i Check the expiry date of the first-aid kit
annually, and replace the contents when
necessary. i
When using the jack, you should also
observe the safety notes in the "Flat tyre"
section (Y page 243).
Long-wheelbase station wagon Warning triangle
The warning triangle is attached to the under-
side of the rear bench seat.
1
Warning triangle
2 Tabs
X Release tabs 2.
X Remove warning triangle 1. 1
Press-stud
2 Side reflectors
3 Leg
X To set up: fold feet1down and out to the
side.
X Pull side reflectors 2upwards to form a
triangle and lock them at the top using
upper press-stud 1. Practical advice
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Page 203 of 293
Display
messages 200 Display messages Possible cause/consequence Possible solution
Ê Close boot lid The luggage compartment door is open. X
Close the luggage compartment door. Y G
Risk of accident
Vehicles with an anti-theft alarm sys-
tem*: you are driving with the bonnet
open. X
Stop the vehicle. Pay attention to traffic con-
ditions as you do so.
X Close the bonnet. ± One or more electronic systems are
unable to deliver information to the on-
board computer. The following systems
may have failed:
R
coolant temperature gauge
R rev counter
R cruise control or Speedtronic display X
Visit a qualified specialist workshop. Ï The cooling fan for the coolant is faulty. X
If the coolant temperature is less than 120 †,
you can continue driving to the nearest quali-
fied specialist workshop.
X Avoid heavy loads on the engine (e.g. driving in
mountainous terrain) and stop-and-go driving. Practical advice
* optional
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Display
messages 201Display messages Possible cause/consequence Possible solution
# The battery is not being charged. Possible
ca
uses are:
R a faulty alternator
R a torn poly-V-belt
R a malfunction in the electronics X
Stop immediately and safely when traffic con-
ditions allow and check the poly-V-belt.
X If it has torn: do not drive on. Contact the
nearest qualified specialist workshop.
X If it is not damaged: have the vehicle checked
immediately at a qualified specialist workshop. # The battery voltage is too low. X
Start the engine.
X Switch off consumers that are not required. 2 Brake wear The brake pads/linings have reached
their wear limit. X
Have the brake pads/linings replaced as soon
as possible at a qualified specialist workshop. 3 Check brake fluid
level G
Risk of accident
There is insufficient brake fluid in the
brake fluid reservoir. X
Pull over as soon as it is safe to do so.
X Do not continue driving under any circumstan-
ces.
X Consult the nearest qualified specialist work-
shop.
X Do not top up the brake fluid. This will not rec-
tify the malfunction. 3 Electronic brake
force distribution
Consult workshop G
Risk of accident
Electronic brake force distribution has
been switched off due to a malfunction.
BAS is also inoperative.
The brake system is still available with
complete brake boosting effect. X
Drive on carefully.
X Visit a qualified specialist workshop immedi-
ately. Practical advice
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Display
messages 203Display messages Possible cause/consequence Possible solution
Ï Coolant Stop car
Turn eng. off The coolant is too hot. X
Stop the vehicle. Pa y attention to traffic con-
ditions as you do so.
X Switch off the engine.
X Wait until the message disappears before
restarting the engine. Otherwise, there is a risk
of engine damage.
X Observe the coolant temperature gauge.
X If the temperature increases again, visit a quali-
fied specialist workshop immediately. Ï Coolant Stop car
Turn eng. off The poly-V-belt may have torn. X
Stop the vehicle. Pay attention to traffic con-
ditions as you do so.
X Switch off the engine.
X Check the poly-V-belt.
X If it has torn: do not drive on. Contact the
nearest qualified specialist workshop.
X If it is not damaged: do not start the engine
again until the message disappears. Other-
wise, there is a risk of engine damage. B Top up coolant See
Owner's Manual The coolant level is too low. X
Top up the coolant, observing the warning
notes before doing so (Y page 161).
X Have the coolant system checked at a qualified
specialist workshop if the coolant needs top-
ping up more often than usual. Practical advice
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Display
messages 207Display messages Possible cause/consequence Possible solution
. Reversing lamp The reversing lamp is fa
ulty. X
Replace the bulb (Y page 235). . Tail lamp left
Back-up bulb on
or
Tail lamp right
Back-up bulb on The left-hand or right-hand tail lamp is
faulty. Another lamp has taken over its
function. X
Replace the bulb (Y page 235). ò Replace air
cleaner The engine air filter must be replaced. X
Visit a qualified specialist workshop. N Check eng. oil
level when next
refuelling The engine oil level has dropped to a crit-
ical level. X
Check the engine oil level (Y page 159) and top
up the engine oil if necessary.
X Have the engine checked for leaks if the engine
oil needs topping up more often than usual. N Engine oil level
Stop car Turn eng.
off There is insufficient oil in the engine.
There is a danger of engine damage. X
Stop the vehicle. Pay attention to traffic con-
ditions as you do so.
X Switch off the engine.
X Top up the engine oil and check the level
(Y page 159). N Engine oil level
Consult workshop You have added too much engine oil.
There is a risk of damaging the engine or
catalytic converter. X
Siphon off excess engine oil until it is at the
specified level. Observe the legal require-
ments. N Engine oil level
Consult workshop There is water in the engine oil. X
Have the engine oil checked. Practical advice
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Display
messages 208 Display messages Possible cause/consequence Possible solution
N Engine oil level
Consult workshop The engine oil level has dropped to a crit-
ical level. X
Check the engine oil level (Y page 159) and top
up the engine oil if necessary.
X Have the engine checked for leaks if the engine
oil needs topping up more often than usual. N Cannot measure
engine oil level The measuring system is faulty. X
Visit a qualified specialist workshop. I Replace key The key no longer functions. X
Visit a qualified specialist workshop. ( Lock driver's seat
or
Lock front-pass.
seat The seat backrest is not engaged. X
Push the backrest back until it engages. Ñ Cr. control and
SPEED-TRONIC inop-
erative Speedtronic and cruise control are
unavailable. X
Visit a qualified specialist workshop. 4 Reserve fuel level The fuel level has fallen below the reserve
range. The operation of the auxiliary heat-
ing* can no longer be guaranteed. X
Refuel at the nearest filling station. t Telephone Enter
PIN
or
TEL PIN? You have not yet logged on to your mobile
phone*. X
Enter the PIN for the SIM card. Practical advice
* optional
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