2005 MERCEDES-BENZ CLK320 CABRIOLET Owner's Manual

192 Controls in detailAutomatic climate control (CLK 500/CLK 55 AMG)The automatic climate control is operation-
al whenever the engine is running. You can
operate the climate control system in ei-
ther the automatic or manual mode. The
system cools or heats the interior depend-
ing on the selected interior temperature
and the current outside temperature.Nearly all dust particles, pollutants and
odors are filtered out before outside air
enters the passenger compartment
through the air distribution system.
The air conditioning will not engage (no
cooling) if the modeAC
OFF
is activated or
mode AC is deactivated (page 198).
Warning
G
When operating the automatic climate
control, the air that enters the passenger
compartment through the air vents in the
footwell can be very hot or very cold
(depending on the set temperature). This
may cause burns or frostbite on unprotected
skin in the immediate area of the air vents.
Always keep sufficient distance between
unprotected parts of the body and the foot-
well air vents. If necessary change the air
flow using the air distribution controls to
direct the air away from the footwell air
vents (
page 194).
Warning!
G
Follow the recommended settings for
heating and cooling given on the following
pages. Otherwise the windows could fog up,
impairing visibility and endangering you and
others.
iSevere conditions (e.g. strong air
pollution) may require replacement of
the filter before its scheduled interval.
A clogged filter will reduce the air
volume to the interior.
If the vehicle interior is hot, ventilate
the interior before driving off, see
“Opening (Summer opening feature)”
(page 243).
Keep the air intake grille in front of the
windshield free of snow and debris.
Do not obstruct air flow by placing
objects on the air flow-through exhaust
slots below the rear window.

193 Controls in detail
Automatic climate control (CLK 500/CLK 55 AMG)
Deactivating the automatic climate control system
Deactivating
It is possible to deactivate the automatic
climate control system.
Press button´ (
page 191).
The indicator lamp on the button´
comes on.
The automatic climate control system
is deactivated.Reactivating

Press button´ (
page 191) again.
The indicator lamp on the button´
goes out.
The automatic climate control system
is reactivated.
Setting the temperature
Use temperature controls3 andd for
the left side or6 andb for the right side
(page 191) to separately adjust the air
temperature on each side of the passenger
compartment. You should raise or lower
the temperature setting in small incre-
ments, preferably starting at 72°F (22°C).
Display1Temperature, left
2Blower speed
3Temperature, right
Increasing
Push temperature control3
and/or6 (
page 191).
The automatic climate control system
will correspondingly adjust the interior
air temperature.
Decreasing

Push temperature controlb
and/ord (
page 191).
The automatic climate control system
will correspondingly adjust the interior
air temperature.
iWhen the air conditioning is switched
off, the outside air supply and circula-
tion are also switched off. Only choose
this setting for a short time. Otherwise
the windows could fog up.
iWhen operating the automatic climate
control system in automatic mode, you
will only rarely need to adjust the
temperature, air volume and air
distribution.

194 Controls in detailAutomatic climate control (CLK 500/CLK 55 AMG)Adjusting air distribution
Use the buttonU for automatic mode
or air distribution controls1 and8
(page 191) to separately adjust the air
distribution on each side of the passenger
compartment. The following symbols are
found on the controls:
Adjusting manually

Turn air distribution control1 or8
(page 191) to the desired symbol.
The indicator lamp on the buttonU
goes out.The automatic air distribution is
switched off. The air distribution is
controlled according to the selected
control setting.
Adjusting automatically

Press buttonU (
page 191).
The indicator lamp on the button
comes on.
The air volume is controlled automati-
cally for the entire vehicle, and the air
distribution is controlled automatically
for each separate half of the vehicle.
Windshield fogged on the outside

Switch the windshield wipers on
(page 52).

Switch to manual mode.

Turn air distribution control1 or8
toa orY (
page 191).
Adjusting air volume
Use buttonU for automatic mode or air
volume controls
orQ
(page 191) to adjust air volume
manually.
Adjusting manually
Seven blower speeds are available.

Press air volume control
orQ
(page 191) until the requested
blower speed is attained.
The indicator lamp on the buttonU
goes out.
The automatic air distribution remains
switched on.
Symbol
Function
Z
Directs air to the windshield
and the side defroster vents
b
Directs air into the entire
vehicle interior
Y
Directs air to the footwells
a
Directs air through the center,
side and rear passenger
compartment air vents

195 Controls in detail
Automatic climate control (CLK 500/CLK 55 AMG)
Adjusting automatically
Press buttonU (
page 191).
The indicator lamp on the button
comes on.
The air volume is controlled automati-
cally for the entire vehicle, and the air
distribution is controlled automatically
for each separate half of the vehicle.
Defrosting
Activating
Press buttonP or0
(page 191).
The indicator lamp on the button
comes on.
The air conditioning switches automatical-
ly to the following functions:


maximum blowing and heating
power


air flows onto the windshield and
the front side windows


the air recirculation mode is
switched off
Deactivating

Press buttonP or0
(page 191) again.
The indicator lamp on the button goes
out. Defrosting is turned off.
The previous settings are once again in
effect.
Maximum cooling MAXCOOL
If the left and right air distribution controls
as well as the airflow volume control are
set toU (
page 191) and there is a
high need for cooling, the display
“MAXCOOL” appears.This provides the fastest possible cooling
of the vehicle interior (when side windows
and soft top are closed).
Air recirculation mode
Switch to air recirculation mode to prevent
unpleasant odors from entering the vehicle
from the outside. This setting cuts off the
intake of outside air and recirculates the
air in the passenger compartment.
iThese settings should only be selected
for a short time.
Warning!
G
When the outside temperature is below
41°F (5°C), only switch to air recirculation
mode for short periods to prevent window
fogging.
Window fogging may impair visibility and
endanger you and others.

196 Controls in detailAutomatic climate control (CLK 500/CLK 55 AMG)Activating
Press button, (
page 191).
The indicator lamp on the button
comes on.Deactivating

Press button, (
page 191).
The indicator lamp on the button goes
out.
The air recirculation mode is deactivated
automatically:


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


after five minutes if the air conditioning
is turned off


after 30 minutes if the outside
temperature is above
approximately 41°F (5 °C)
iIf you keep button, pressed, the
side windows will close.Warning!
G
Never operate the side windows if there is
the possibility of anyone being harmed by
the closing procedure.
In the event that the closing procedure
causes potential danger, the closing of the
side windows can be immediately halted by
releasing the, button or by pressing or
pulling the respective window switch.
iThe air recirculation mode is activated
automatically:

at high outside temperatures


if the concentration of carbon mon-
oxide and nitrogen oxide in the out-
side air increases, for example in a
tunnel (charcoal filter must be
activated for the air recirculation
mode to be activated automatically)
The indicator lamp on the, button
is not lit when the air recirculation
mode is automatically switched on.
After approx. 30 minutes, outside air is
added to the air inside the vehicle.
If you have turned off the air
conditioning (
page 198) or the out-
side temperature is below 41°F (5°C),
the air recirculation mode will not
switch on automatically.
iIf you keep button, pressed, the
side windows will return to their previ-
ous position.

197 Controls in detail
Automatic climate control (CLK 500/CLK 55 AMG)
At outside temperatures above 79°F
(26 °C) the system will not automatically
switch back to outside air. A quantity of
outside air is added after approximately
30 minutes.Charcoal filter
An activated charcoal filter markedly
reduces bad odors and removes pollutants
from air entering the passenger compart-
ment. The charcoal filter can be activated
or deactivated.
The system switches automatically to the
air recirculation mode, if the

carbon monoxide (CO)
or


nitrogen oxide (NO
X)
concentration of the outside air increases
beyond a predetermined level.Activating

Press buttone (
page 191).
The indicator lamp on the button
comes on.Deactivating

Press buttone (
page 191).
The indicator lamp on the button goes
out.
iThe automatic air recirculation mode
does not function if theAC
OFF
(indica-
tor lamp on button° illuminated)
orA/C (indicator lamp on button2
not lit) mode is selected or if the out-
side temperature has fallen
below 41°F (5°C).
iIf you keep buttone pressed, the
side windows will close.iThe activated charcoal filter should be
switched off when windows fog up on
the inside, or if the passenger compart-
ment needs to be quickly heated or
cooled down.
Warning!
G
Never operate the side windows if there is
the possibility of anyone being harmed by
the closing procedure.
In the event that the closing procedure
causes potential danger, the closing of the
side windows can be immediately halted by
releasing thee button or by pressing or
pulling the respective window switch.iIf you keep buttone pressed, the
side windows will return to their previ-
ous position.

198 Controls in detailAutomatic climate control (CLK 500/CLK 55 AMG)Air conditioning
The air conditioning is operational while
the engine is running and cools the interior
air to the temperature set by the operator.Deactivating
It is possible to deactivate the air condi-
tioning (cooling) function of the automatic
climate control system. The air in the
vehicle will then no longer be cooled or
dehumidified.
Automatic climate control panel
design A

Press button° (
page 191).
The indicator lamp on the button
comes on.
The cooling function switches off after
a short delay.
Automatic climate control panel
design B

Press button2(
page 191).
The indicator lamp on the button goes
out.
The cooling function switches off after
a short delay.Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condi-
tioning.
Automatic climate control panel
design A

Press button°(
page 191) again.
The indicator lamp on the button goes
out.
The cooling function is switched on.
Automatic climate control panel
design B

Press button2(
page 191)
again.
The indicator lamp on the button
comes on.
The cooling function is switched on.
The air conditioning uses the refrigerant
R134a. This refrigerant is free of CFCs
which are harmful to the ozone layer.
iCondensation may drip out from under-
neath 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.

199 Controls in detail
Automatic climate control (CLK 500/CLK 55 AMG)
Residual heat and ventilation*
(available on Automatic climate control panel design A 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.
Activating
Switch off the ignition (
page 36).

Press button°(
page 191).
The indicator lamp on the button
comes on.Deactivating

Press button°(
page 191).
The indicator lamp on the button goes
out.
The residual heat is automatically turned
off:


when the ignition is switched on


after about 30 minutes


if the battery voltage drops
!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
Center.
iHow long the system will provide
heating depends on

the coolant temperature


the temperature set by the operator
The blower will run at speed setting 1
regardless of the air distribution
control setting.