cooling MERCEDES-BENZ G-CLASS SUV 2008 Owners Manual

31, 2, 3 ...
4ETS (Electronic Traction Support )............ 50 A
ABS (Anti-lock Braking System) ..........48
Display message ............................. 196
Warning lamp.................................. 212
Acceleration
Technical data. ............................... 265
Accident
Notes. ............................................. 218
Active service system
see Service display
Airbag
Activation.......................................... 33
Control unit....................................... 33
Driver's ............................................. 37
Front. ................................................ 37
Front passenger ................................ 37
PASSENGER AIRBAG OFF warning
lamp .............................................. 211
System.............................................. 35
Windowbags. .................................... 37
Air conditioning
Activating/deactivating ..................124
Activating/deactivating air-recir-
culation mode. ................................ 129
Auxiliary heating/ventilation........... 130 Controlling automatically.
...............124
Cooling with air dehumidification ...124
Demisting the windscreen ..............127
Malfunction indicator lamp. ............210
Misted-up windows. ........................127
Rear window heating ......................128
Setting the air distribution. .............126
Setting the airflow .......................... 127
Setting the air vents .......................125
Setting the temperature .................125
Switching the residual heat func-
tion on/off ...................................... 129
Thermatic. ...................................... 122
Air-conditioning
Windscreen heating. .......................128
Air-conditioning system
see Air conditioning
Air filter
Display message ............................. 207
Antifreeze concentration................... 281
Anti-lock braking system see ABS
Anti-theft alarm system
see ATA
Anti-theft systems................................ 51
Ashtray................................................ 148
ASSYST see Service display
ATA (anti-theft alarm system)............. 51
Switching off the alarm. ....................52Audible warning signal......................
217
AUTO lights Display message ............................. 204
Automatic car wash........................... 183
Automatic transmission Changing gear yoursel f..................... 90
Display message ............................. 198
Driving tips ....................................... 91
Emergency running mode ...............222
Instrument cluster display. ...............89
Malfunction..................................... 222
Oil level.. ......................................... 161
One-touch gearshifting. ....................90
Releasing the parking lock man-
ually. ............................................... 233
Selector lever positions. ...................89
Shift ranges. ..................................... 91
Trailer towing. ................................... 91
Auxiliary heating ................................ 130
Malfunction..................................... 228
Remote control ............................... 131
Setting (on-board computer).......... .105
Auxiliary ventilation ...........................130
Axle load, maximum permissible
............................................ .271, 272, 273 B
Backrest Display message ............................. 208
BAS (Brake Assist)............................... 48 Index
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Air conditioning
121
i
The reversing camera also functions
when towing a trailer.
Switching off the reversing camera X
Shift the automatic transmission to P,Nor
D.
or
X In COMAND APS, activate another func-
tion. (See the separate COMAND APS oper-
ating instructions.) Air conditioning
General notes
The vehicle is equipped with the Thermatic
air-conditioning system. Thermatic combines
an automatic heating and ventilation system
with a cooling system.
Thermatic controls the temperature and the
humidity of the vehicle interior and filters out
undesirable substances from the air.
Thermatic is only operational when the
engine is running. Optimum operation is ach-
ieved only when you drive with the side win-
dows and sliding/tilting sunroof* closed.
i Ventilate the vehicle for a brief period
during warm weather, e.g. using the sum-
mer opening feature (Y page 85). This will
speed up the cooling process and the desired interior temperature will be
reached more quickly.
i The integrated filter filters out most par-
ticles of dust and completely filters out pol-
len. A clogged filter reduces the amount of
air supplied to the vehicle interior. For this
reason, you should always observe the
interval for replacing the filter, which is
specified in the Service Booklet. As it
depends on environmental conditions, e.g.
heavy air pollution, the interval may be
shorter than stated in the Service Booklet. G
Risk of accident
Observe the settings recommended on the
following pages. The windows could other-
wise mist up. This may obstruct your view
of the traffic situation, thereby causing an
accident. Cont
rols
* option al
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Air conditioning
123Function Recommendation/Notes
5
F
Switches the rear window heating on/off i
At very low temperatures, the rear window heating is
only switched on once the vehicle interior has warmed
up. (Y
page 128) 6
9
Activates/deactivates cooling with air dehumidifi-
cation i
Switch on the cooling with air dehumidification func-
tion. The indicator lamp in the 9button lights up. (Y
page 124) 9
Activates/deactivates the auxiliary heating/venti-
lation i
You can use the residual heat to heat or ventilate the
vehicle interior after you have switched off the ignition. (Y
page 129) 7
U
Controls the air conditioning automatically i
Activate automatic air conditioning. The indicator
lamp in the Ubutton comes on. (Y
page 124) 8
,
Activates/deactivates air-recirculation mode i
Only use this operating mode for a short time, e.g. in
a tunnel. Otherwise, the windows could mist up due to
a lack of fresh air. (Y
page 129) 9
P
Activates/deactivates the demisting function for
the windscreen i
Only use the "demisting" function until the wind-
screen is clear again. (Y
page 127) Cont
rols
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Air conditioning
124 Switching the air conditioning on/off
i When the air conditioning is switched off,
the air supply and air circulation are also
switched off. Only select this setting briefly,
otherwise the windows may mist up.
Thermatic X
Make sure that the key is in position 2in
the ignition lock or that the engine is run-
ning.
X To activate: turn thumbwheel 1clock-
wise to the desired position (apart from the
0 position) (Y page 122).
X The previously selected settings come into
effect again.
X To deactivate: turn thumbwheel 1anti-
clockwise to position 0(Y page 122). Switching cooling with air dehumidi-
fication on/off
The "cooling with dehumidification" function
is only available when the engine is running.
The air inside the vehicle is cooled and dehu-
midified according to the temperature selec-
ted. This prevents the windows from misting
up. G
Risk of accident
If the "cooling with air dehumidification"
function is deactivated, the air inside the
vehicle will not be cooled (during warm
weather) or dehumidified. The windows
could mist up more quickly. This may pre-
vent you from observing the traffic condi-
tions, thereby causing an accident. H
Environmental note
The cooling system uses the refrigerant
R134A. This refrigerant does not damage
the earth's ozone layer.
i Condensation may drip from the under-
side of the vehicle when Thermatic is in
cooling mode. X
To activate: press the9button.
The indicator lamp in the 9button lights
up.
X To deactivate: press the9button.
The indicator lamp in the 9button goes
out. Controlling the air conditioning auto-
matically
In automatic mode, the set temperature is
maintained automatically at a constant level.
To do so, the system automatically regulates
the temperature of the dispensed air, the air-
flow and the air distribution. The "cooling with
air dehumidification" function is on.
X Make sure that the engine is running.
X Set the desired temperature.
X To activate: press theUbutton
(Y page 122).
The indicator lamp in the Ubutton
comes on. Automatic air distribution and
airflow are activated.
X To deactivate: press theUbutton.
The indicator lamp in the Ubutton goes
out. Automatic air distribution and airflow
are deactivated. Cont
rols
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Air conditioning
127Setting the airflow
X Press the Ubutton.
The indicator lamp in the Ubutton goes
out.
X To increase/reduce: turn thumbwheel
1 clockwise or anti-clockwise
(Y page 122).
i The airflow from the rear-compartment
vents and the centre vents is the same. Demisting the windscreen
i You should only select the "demisting"
function until the windscreen is clear again.
i If you have switched on the demisting
function with the Pbutton, you cannot
make any other settings.
X To activate: press thePbutton.
The indicator lamp in the Pbutton
comes on.
The system automatically switches to the
following functions:
R cooling with air dehumidification off
R high airflow
R high temperature R
air distribution to the windscreen and
front side windows
R air-recirculation mode off
i If necessary, also activate the windscreen
heating* (Y page 128).
X To switch off: press thePbutton.
The indicator lamp in the Pbutton goes
out. The previously selected settings come
into effect again.
or
X Press the Ubutton.
The indicator lamp in the Ubutton
comes on. The indicator lamp in the P
button goes out. Airflow and air distribution
are set to automatic mode. Demisting the windows
Windows misted up on the inside X
Activate the "demisting" function.
X If necessary, activate the windscreen heat-
ing* (Y page 128).
Windows misted up on the outside X
Activate the windscreen wipers.
X Close the centre air vents.
When automatic air distribution is switched
off:
X Turn the air distribution thumbwheel to the
Y ora symbol.
i You should only select this setting until
the windscreen is clear again.
X If necessary, activate the windscreen heat-
ing* (Y page 128). Cont
rols
* option al
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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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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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Troubleshooting
210 Troubleshooting
Points to remember
G
Risk of accident and injury
If maintenance work is carried out incorrectl y this can jeopardise the operating safety of your vehicle. You risk losing control of your vehicle
and thereby causing an accident. The safety systems may also no longer be able to protect you or others as they are designed to do.
Always have maintenance work carried out at 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 for this purpose.
In particular, all work relevant to safety or on safety-related systems must be carried out at a qualified specialist workshop. Warning and indicator lamps in switches and buttons
Problem Possible cause/consequence Suggested solutions
One or all of the indicator lamps
in the seat heating button are
flashing. There is insufficient voltage
because too many consumers are
switched on. The seat heating has
switched itself off automatically. X
Switch off consumers that are not required, e.g. reading lamps,
interior lighting, etc.
The seat heating will automatically switch back on as soon as there
is sufficient voltage again. The indicator lamp in the
9
button on the Thermatic control
panel is on or flashes when you
press the button. The cooling sys-
tem cannot be switched on. The cooling system is losing
refrigerant. X
Visit a qualified specialist workshop. Practical advice
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Trailer coupling*
274 Trailer coupling*
Mounting dimensions
G
Risk of accident
Only have a trailer coupling retrofitted at 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 for this pur-
pose. In particular, work relevant to safety
or on safety-related systems must be car-
ried out at a qualified specialist workshop.
! If you have a trailer tow hitch retrofitted,
changes to the cooling system may be nec-
essary, depending on the vehicle type.
If you have a trailer tow hitch retrofitted,
observe the anchorage points on the chas-
sis frame. Anchorage points for the trailer coupling
1
Anchorage points
2 Overhang dimension For trailer couplings fitted at the factory, the
overhang dimension is 895 mm.Techni
cal data
* optional
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Service products and capacities
280
Capacities The following values refer to an oil change including the oil filter.
Engine with oil filter G 500 G 320 CDI G 55 AMG
Replacement amount
9.0 l 8.0 l 8.5 l
Coolant
The coolant is a mixture of water and anti-
freeze/corrosion inhibitor. It performs the
following tasks:
R anti-corrosion protection
R antifreeze protection
R raising the boiling point
i When the vehicle is first delivered, it is
topped up with a coolant that will ensure
adequate antifreeze and corrosion protec-
tion.
! Only top up with coolant that has been
premixed with the desired antifreeze pro-
tection. You could otherwise damage the
engine.
There is more information about coolant
and topping it up on Mercedes-Benz Spec- ifications for Service Products Sheet
310.1.
! Always use a suitable coolant mixture,
even in countries where high temperatures
prevail.
Otherwise, the cooling system will not be
sufficiently protected from corrosion, and
the boiling point will be too low.
If antifreeze/corrosion inhibitor is present in
the correct concentration, the boiling point of
the coolant will be around 130 °C.
The antifreeze/corrosion inhibitor concentra-
tion in the cooling system should:
R be at least 50%. This will protect the cooling
system against freezing down to around
–37 °C.
R not exceed 55% concentration (antifreeze
protection down to –45 °C), otherwise heat
will not be effectively dissipated. If the vehicle has lost coolant, top it up with
equal amounts of water and antifreeze/cor-
rosion inhibitor. Mercedes-Benz recom-
mends using an antifreeze/corrosion inhibi-
tor which has been approved for Mercedes-
Benz vehicles.
! The cooling system contains a filling
which must be renewed after 15 years, or
after 250,000 km at the latest. Have the
renewal confirmed in the Service Booklet.
The warranty is only valid if you top up with
an antifreeze/corrosion inhibitor which
has been approved by Mercedes-Benz, and
observe the recommended mixing ratios. Technical data
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