2008 MERCEDES-BENZ G55AMG climate control

186 Controls in detail
Climate control
Increasing
Turn temperature control2
and/or 3 (
page 183) slightly
clockwise.
The climate control system will
correspondingly adjust the interior air
temperature.
Decreasing
Turn temperature control 2
and/or 3 (
page 183) slightly
counterclockwise.
The climate control system will
correspondingly adjust the interior air
temperature.
Adjusting air distribution
Use air distribution control 4
(
page 183) to adjust the air distribution.
The following symbols are found on the
controls:
Press button U (page 183).
The indicator lamp on the button goes
out. The automatic air distribution con-
trol is switched off. The air distribution
is adjusted according to the currently
selected setting.
Turn air distribution control 4
(
page 183) to the desired symbol.
Adjusting air volume
Six blower speeds are available.
Press button U (page 183).
The indicator lamp on the button goes
out. The automatic air volume control
is switched off. The air volume is
adjusted according to the currently
selected setting.
Turn air volume control 1
(
page 183) to the desired blower
speed.
iIf you turn the temperature control fully
clockwise for one side of the vehicle, you are
increasing the temperature for the other side of
the vehicle as well.
iIf you turn the temperature control fully
counterclockwise for one side of the vehicle, you
are decreasing the temperature for the other
side of the vehicle as well.
SymbolFunction
aDirects air through the center,
side, and rear passenger
compartment air vents
ZDirects air to the windshield
and the side defroster air vents
bDirects air into the entire
vehicle interior
YDirects air to the footwells
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187
Controls in detail
Climate control
Adjusting air volume for the center air
vents
Opening the center air vents
Turn thumbwheel
5 and/or 8
(
page 182) to the right.
Center air vent 6 and/or7
(
page 182) is open.
Closing the center air vents
Turn thumbwheel 5 and/or 8
(
page 182) to the left.
Center air vent 6 and/or7
(
page 182) is closed.
Adjusting air volume for the side air
vents
Opening the side air vents
Turn thumbwheel 3 and/or a
(
page 182) to the right.
Side air vent 2 and/orb
(
page 182) is open. Closing the side air vents
Turn thumbwheel
3 and/or a
(
page 182) to the left.
Side air vent 2 and/orb
(
page 182) is closed.
Front defroster
You can use this setting to defrost the
windshield, for example if it is iced up.
You can also defog the windshield and the
side windows. Activating
Press button
0 orP
(
page 183).
The indicator lamp on the button
comes on.
The climate control switches to the
following functions automatically:

maximum blower speed and
heating power

air flows onto the windshield and
the front side windows (side air
vents must be open)

the air recirculation mode is
switched off
iKeep this setting selected only until the
windshield or the side windows are clear again.
iIf you have switched on the defrost function
using button 0 orP , you cannot make
any other settings.
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188 Controls in detail
Climate control
Deactivating
Press button0 orP
(
page 183) once more.
The indicator lamp on the button goes
out. Defrosting is switched off.
Windshield fogged on the outside
Switch the windshield wipers on
(
page 58).
If the automatic mode of the climate
control is switched off:
Turn air distribution control 4
to a orY (
page 183).
Air recirculation mode
Switch to air recirculation mode to prevent
unpleasant odors from entering the vehicle
from the outside (e.g. before driving
through a tunnel). This setting cuts off the
intake of outside air and recirculates the
air in the passenger compartment. Activating
Press button
, (page 183).
The indicator lamp on the button
comes on.
iThe cooling remains switched on.
iKeep this setting selected only until the
windshield is clear again.Warning!G
Fogged windows impair visibility, endanger-
ing you and others. If the windows begin to
fog on the inside, switching off the air
recirculation mode immediately should clear
interior window foggin g. If interior window
fogging persists, make sure the air
conditioning (
page 189) is activated, or
press button 0 orP .
iThe air recirculation mode is activated
automatically at high outside temperatures.
The indicator lamp on button , is not lit when
the air recirculation mode is switched on auto-
matically.
A quantity of outside air is added after approxi-
mately 30 minutes.
If you have turned off the air conditioning
(
page 189) or the outside temperature is
below 41°F (5°C), the air recirculation mode will
not switch on automatically.
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189
Controls in detail
Climate control
Deactivating
Press button
, (page 183) once
more.
The indicator lamp on the button goes
out.
Air conditioning
The cooling function, only operational
when the engine is running, cools the
vehicle interior down to the selected
temperature. The cooling function also
dehumidifies the air in the vehicle interior,
thus preventing the windows from fogging
up. 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
9 (page 183).
The indicator lamp on the button goes
out.
The cooling function switches off after
a short delay.iThe air recirculation mode is deactivated
automatically:

after 5 minutes if the outside temperature is
below approximately 41°F (5°C)

after 5 minutes if the air conditioning is
turned off

after 30 minutes if the outside temperature
is above approximately 41°F (5°C)
iCondensation may drip out from underneath
the vehicle. This is normal and not an indication
of a malfunction.
Warning!G
If you turn off the coo ling function, the inte-
rior air is not dried. The windows can fog up
more quickly. Window fogging may impair
visibility and endanger you and others.
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190 Controls in detail
Climate control
Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.
Press button9 (page 183) once
more.
The indicator lamp on the button
comes on.
The air conditioning uses the refrigerant
R134a. This refrigerant is free of CFCs
which are harmful to the ozone layer.
Residual heat and ventilation
With the engine switched off, it is possible
to continue to heat or ventilate the interior
for up to 30 minutes. This feature makes
use of the residual he at produced by the
engine. Activating
Turn the SmartKey in the starter switch
to position
0 or 1 (
page 39).
or
Remove the SmartKey from the starter
switch.
Press button 9 (page 183).
The indicator lamp on the button
comes on.
Deactivating
Press button 9 (page 183) once
more.
The indicator lamp on the button goes
out.!If the air conditioning cannot be turned on
again, this indicates that the air conditioning is
losing refrigerant. The compressor has turned
itself off.
Have the air conditioning checked at the nearest
authorized Mercedes-Benz Light Truck Center.
iHow long the system will provide heating
depends on

the coolant temperature

the battery voltage
Regardless of the temperature and air volume
set on the climate control panel, an interior
temperature is aimed at by 72°F (22°C) and the
blower runs on low speed to protect the vehicle
battery.
iThe residual heat is automatically turned off:

when the ignition is switched on

after about 30 minutes

if the coolant temperature is too low

if the battery voltage drops
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191
Controls in detail
Climate control
Rear passenger compartment
adjustable air vents
The air conditioning for the rear passenger
compartment is contro
lled via the climate
control panel (
page 183).
The air vents for the rear passenger
compartment are located in the rear
center console.
1Thumbwheel for air volume control for
center air vents
2 Left center air vent, adjustable
3 Right center air vent, adjustable Adjusting air
distribution
Push the slide for the left center
vent2 or right center air vent 3 to
the left, right, up, or down.
The air flow is directed in the
corresponding direction.
Adjusting air volume
Turn thumbwheel 1 up.
The air volume is increased.
Turn thumbwheel 1 down.
The air volume is decreased.iThe temperature at the center air vents 2
and 3 for the rear passenger compartment is
the same as at the dashboard center air vents.
iFor draft-free ventilation, move the sliders
for the center air vents 2 and 3 upward.
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258 Operation
Driving instructions

Comply with the warnings
(
page 253) and rules for off-road
driving (
page 253).

Switch off the exterior lamps as well as
the climate control.

Select gear range 2 or 1 on the auto-
matic transmission (
page 167).

Enter and leave the water only at a
shallow spot, driving at walking speed.

Drive through the water slowly and at a
constant speed.

Do not stop vehicle while immersed in
water, and do not shut off the engine.
There is a very high level of driving
resistance in water. The surface is
slippery and may not be firm, making
pulling away in water difficult and
dangerous.

Make sure that only small bow waves
are formed when driving the vehicle
through water.

Clean mud off the tire tread after
driving through water.

To dry the brakes, apply pressure to the
brake pedal several times after leaving
the water. Crossing obstacles
!Never accelerate before driving into the
water. The bow wave could force water into the
engine and auxiliary equi pment, thus damaging
them.
!Do not open any of the vehicle’s doors while
driving through water. Water could otherwise en-
ter the vehicle interior and damage the vehicle’s
electronics, as well as the interior equipment.
!Obstacles can damage the vehicle
underbody or suspension components. If possi-
ble, use the assistance of a second person out-
side the vehicle to scout the path you intend to
take and check for adeq uate ground clearance
when you cross obstacles with your vehicle. The
person assisting you outside the vehicle should
always be a safe distance away from the vehicle
and positioned so that he or she cannot get hurt
in case of any unexpected vehicle movement.
After off-road driving or crossing obstacles,
inspect vehicle for any damage, especially
vehicle underbody and suspension components.
Failure to do so can adversely affect the vehi-
cle’s future performance, including increased
chance of an accident.
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302 Operation
Tires and wheels
Uniform Tire Quality Grading Standards
(U.S. vehicles)
Tire manufacturers are required to grade
tires based on three performance
factors: treadwear, traction and
temperature resistance.1 Treadwear
2 Traction
3 Temperature resistance Quality grades can be found, where
applicable, on the tire sidewall between
tread shoulder and maximum section
width. For example:
All passenger car tires must conform to
federal safety requirements in addition to
these grades.
Treadwear
The treadwear grade is
a comparative rat-
ing based on the wear rate of the tire when
tested under controlled conditions on a
specified government test course. For
example, a tire graded 150 would wear one
and one-half (1
1/2) times as well on the
government course as a tire graded 100.
The relative performance of tires depends
upon the actual condit ions of their use,
however, and may depart significantly
from the norm due to variations in driving
habits, service practices and differences in
road characteristics and climate.
iFor illustration purposes only. Actual data
on tires are specific to each vehicle and may vary
from data shown in above illustration.
TreadwearTractionTemperature
200AAA
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