2008 MERCEDES-BENZ CLS500 window

191 Controls in detail
4-zone automatic climate control
Canada only
1Air distribution, driver’s side
2Front window defroster
3Temperature rocker switch, driver’s
side
4Display
5Temperature rocker switch,
passenger side
6Rear window defroster
7Air distribution, passenger side
8Air distribution and air volume, pas-
senger side (automatic, manual)
9AC cooling on/off
aRear air-conditioning remote control
bIncreasing air volume
cClimate control on/off
dDecreasing air volume
eResidual heat/ventilation
fAir recirculation
gAir distribution and air volume, driv-
er’s side (automatic, manual)

193 Controls in detail
4-zone automatic climate control
The air conditioning will not engage (no
cooling) if the A/C mode (
page 201) is
deactivated.Deactivating the climate control
systemDeactivating
Press button´ (page 190) or
(
page 191) until the display4
(
page 190) or (page 191) is
cleared.
Reactivating
Make sure the ignition is switched on.
Press button´ (page 190) or
(
page 191) again.
The previous settings are once again in
effect.
Warning!G
Severe conditions (e.g. strong air pollution)
may require replacement of the filter before
its scheduled replacement interval. A
clogged filter will reduce the air volume to
the interior and the windows could fog up,
impairing visibility and endangering you and
others. Have a clogged filter replaced as
soon as possible at an authorized
Mercedes-Benz Center.
Warning!G
Follow the recommended settings for heat-
ing and cooling given on the following pag-
es. Otherwise the windows could fog up,
impairing visibility and endangering you and
others.
iKeep the air intake grille in front of the wind-
shield free of snow and debris.
Do not obstruct air flow by placing objects on the
air flow-through exhaust slots below the rear
window.
iIf the vehicle interior is hot, ventilate the in-
terior before driving off, see “Summer opening
feature” (
page 208). The climate control will
then adjust the interior temperature to the set
value much faster.
Warning!G
When the climate control is switched off, the
outside air supply and circulation are also
switched off. Only choose this setting for a
short time. Otherwise the windows could
fog up, impairing visibility and endangering
you and others.
iTo switch the system on, you can also press
another button, with the exception of 1 or
F and T (
page 190) or (page 191).

194 Controls in detail
4-zone automatic climate control
Operating the climate control system
in automatic modeActivatingPress one buttonU (page 190) or
(
page 191) while the engine is run-
ning.
The indicator lamp on the button
comes on.
AUTO appears in display4
(
page 190) or (page 191). The air
volume and air distribution are adjust-
ed automatically.
Use temperature rocker switches3
and5 (
page 190) or (page 191)
to separately adjust the air tempera-
ture on each side of the passenger
compartment.
The temperature of the vehicle interior
is adjusted automatically.Deactivating
Press button
orQ
(
page 190) or (page 191).
The
AUTO indicator in display4
(
page 190) or (page 191) goes
out. The automatic function for air vol-
ume is switched off, and air volume is
controlled according to the desired set-
ting.
or
Turn air distribution controls1
and7 (
page 190) or (page 191)
on each side of the passenger compart-
ment to the desired symbol.
The indicator lamp on the correspond-
ing button goes out. Automatic air dis-
tribution is switched off in the
corresponding zone, and air distribu-
tion is controlled according to the de-
sired position.
The automatic air volume remains
switched on.
iWhen operating the climate control system
in automatic mode, you will only rarely need to
adjust the temperature, air volume and air distri-
bution.
In automatic mode, cooling with dehumidify is
switched on. This function can be switched off.
Warning!G
If you switch off the cooling function the
windows can fog up more quickly. Window
fogging may impair visibility and endanger
you and others.
iYou can switch the automatic climate con-
trol system on and off for each side of the pas-
senger compartment as desired.

197 Controls in detail
4-zone automatic climate control
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 buttony (page 190) or
(
page 191).
The indicator lamp on the button
comes on. Display4 (
page 190) or
(
page 191) is cleared.The climate control switches automatically
to the following functions:

cooling on to dehumidify

most efficient blower speed and
heating power, depending on out-
side temperature

air flows onto the windshield and
the front side windows

the air recirculation mode is
switched off
Deactivating
Press buttony (page 190) or
(
page 191) again.
The indicator lamp on the button goes
out. Defrosting is turned off.
The previous settings are once again in
effect.Windshield fogged on the outside
Switch windshield wipers on
(
page 56).
Press buttonU (page 190) or
(
page 191).
If the automatic mode of the climate con-
trol is switched off:
Turn air distribution control1 and 7
to a or Y (
page 190) or
(
page 191).
iKeep this setting selected only until the
windshield or the side windows are clear again.
iYou can adjust the air volume, air distribu-
tion and the temperature when the front defrost-
er is switched on.
iTo switch the front defroster off, you can
also press buttonU or ´ (
page 190) or
(
page 191).
iThe cooling remains switched on.
iKeep this setting selected only until the
windshield is clear again.

198 Controls in detail
4-zone automatic climate control
Maximum cooling MAX COOL
(USA only)
You can use this setting to provide the fast-
est possible cooling of the vehicle interior
(when windows and tilt/sliding sunroof are
closed).
Activating
Press buttone (page 190).
MAX COOL appears in display4
(
page 190).
The air conditioning switches
automatically to the following functions:

maximum cooling

maximum blowing power

the air recirculation mode is
switched onDeactivating
Press buttone (page 190) again.
MAX COOL disappears in display4
(
page 190).
The previous settings are once again in
effect.
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.
iTo switch the maximum cooling function off,
you can also press button ´, U, y or
1 (
page 190).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 fogging. If interior window
fogging persists, make sure the air
conditioning (
page 201) is activated, or
press buttony.

199 Controls in detail
4-zone automatic climate control
Activating
Press button, (page 190) or
(
page 191).
The indicator lamp on the button
comes on.Deactivating
Press button, (page 190) or
(
page 191) again.
The indicator lamp on the button goes
out.Air recirculation mode with conve-
nience closing or opening feature
iThe air recirculation mode is activated auto-
matically at high outside temperatures and if the
concentration of carbon monoxide (CO) and ni-
trogen oxide in the outside air increases, for ex-
ample in a tunnel.
The indicator lamp on button, is not lit when
the air recirculation mode is automatically
switched on.
A quantity of outside air is added after approxi-
mately 30 minutes.iThe air recirculation mode is deactivated au-
tomatically:

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)
Warning!G
Never operate the windows and tilt/sliding
sunroof if there is the possibility of anyone
being harmed by the opening or closing pro-
cedure.
In the event that the procedure causes po-
tential danger, the closing of the windows
can be immediately halted by pressing or
pulling the respective window switch. The
closing of the tilt/sliding sunroof can be im-
mediately halted by moving the switch for
the tilt/sliding sunroof in any direction.
The closing of the windows and the tilt/slid-
ing sunroof can be reversed by again press-
ing and holding the, button.

200 Controls in detail
4-zone automatic climate control
Convenience closing
Press button, (page 190) or
(
page 191) for approximately
2 seconds.
The windows and tilt/sliding sunroof
will close. You can release button,
once the closing procedure has begun.
The windows and tilt/sliding sunroof
continue closing until they are fully
closed. The indicator lamp on the but-
ton comes on. The air recirculation
mode is activated.Convenience opening
Press button, for approximately
2 seconds.
The windows and tilt/sliding sunroof
will return to their previous position.
You can release button, once the open-
ing procedure has begun. The windows
and tilt/sliding sunroof continue open-
ing until they have reached their previ-
ous position. The indicator lamp on the
button goes out. The air recirculation
mode is deactivated.Combination filter with
pollutant-sensitive air-recirculation
mode
The combination filter reduces pollutants
and unpleasant odors in the outside air.
The pollutant-sensitive air-recirculation
mode automatically switches off the
supply of outside air when pollutants are
detected in the air.
iA window or tilt/sliding sunroof will only re-
turn to its previous position if it has not been
moved to another position using the respective
window switch or tilt/sliding sunroof switch af-
ter it was closed with button,.
A window or tilt/sliding sunroof that has been
moved will remain in its current position if
button, is used to re-open the remaining
windows or tilt/sliding sunroof.
iThe pollutant-sensitive air-recirculation
mode is not possible if you have switched off the
air conditioning or if the temperature falls below
41°F (5°C).

201 Controls in detail
4-zone automatic climate control
Air conditioning
The cooling function, only operational
when the engine is running, cools the vehi-
cle interior down to the selected tempera-
ture. 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 button2 (page 190) or
(
page 191).
The indicator lamp on the button goes
out.
Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.
Press button2 (page 190) or
(
page 191) again.
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
(Canada only)
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 heat produced by the
engine.
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 cooling function, the
vehicle will not be cooled when weather
conditions are warm. The windows can fog
up more quickly. Window fogging may
impair visibility and endanger you and
others.
!If the air conditioning cannot be turned on
again, this indicates that the air conditioning is
losing refrigerant. The compressor has turned it-
self off.
Have the air conditioning checked at the nearest
authorized Mercedes-Benz Center.
iIf you switch on the residual heat function
when temperatures are high, only the ventilation
will be switched on.
iRegardless of the selected air volume, the
blower operates at low speed.