MERCEDES-BENZ CLK-CLASS 2004 Owners Manual

171 Controls in detail
Good visibility
Rear window defroster
The rear window defroster uses a large
amount of power. To keep battery drain to
a minimum, switch off the defroster as
soon as the rear window is clear. The de-
froster is automatically deactivated after
approximately 6 to 17 minutes of opera-
tion depending on the outside tempera-
ture.
Activating
Press buttonF (
page 173).
The indicator lamp on the button
comes on.
Deactivating

Press buttonF (
page 173) again.
The indicator lamp on the button goes
out.
Warning!
G
Any accumulation of snow and ice should be
removed from the rear window before driv-
ing. Visibility could otherwise be impaired,
endangering you and others.!If the rear window defroster switches
off too soon and the indicator lamp
starts flashing, this means that too
many electrical consumers are operat-
ing simultaneously and there is insuffi-
cient voltage in the battery. The system
responds automatically by deactivating
the rear window defroster.
As soon as the battery has sufficient
voltage, the rear window defroster
automatically switches on again.
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172 Controls in detailAutomatic climate control
Automatic climate control
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173 Controls in detail
Automatic climate control
Automatic climate control panel
Item
1
Left side air vent, adjustable
2
Left center air vent, adjustable
3
Thumbwheel for air volume control
for center air vents
4
Right center air vent, adjustable
5
Right side air vent, adjustable
6
Automatic climate control panel
7
Thumbwheel for air volume control
for right side center air vent
8
Thumbwheel for lowering tempera-
ture, center and side air vents
9
Thumbwheel for air volume control
for left side center air ventiFor draft-free ventilation, move the slid-
ers for the center air vents1, 2, 4,
5 to the middle position.
Item
1
Temperature control, left, lowering
2
Temperature control, left, raising
3
Left-side air distribution
(automatic or manual operation)
4
Activated charcoal filter
5
Display
6
Right-side air distribution
(automatic or manual operation)
7
Temperature control, right, raising
8
Temperature control, right,
lowering
9
Rear window defroster
a
AC cooling on/off °Residual heat/ventilation
b
Air volume control
c
Automatic climate control on/off
(complete system)
d
Air recirculation
e
Defrosting
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174 Controls in detailAutomatic climate controlThe 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 en-
ters the passenger compartment through
the air distribution system.
The air conditioning will not engage (no
cooling) if the ° mode is selected
(
page 181).
Warning
G
When operating the automatic climate con-
trol, the air that enters the passenger com-
partment through the air vents in the
footwell can be very hot or very cold (de-
pending on the set temperature). This may
cause burns or frostbite on unprotected skin
in the immediate area of the air vents. Al-
ways keep sufficient distance between un-
protected parts of the body and the footwell
air vents. If necessary change the air flow
using the air distribution controls to direct
the air away from the footwell air vents
(page 176).
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.
iSevere conditions (e.g. strong air pollu-
tion) may require replacement of the fil-
ter 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.
Keep the air intake grille in front of the
windshield free of snow and debris.
Do not obstruct air flow by placing ob-
jects on the air flow-through exhaust
slots below the rear window.
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175 Controls in detail
Automatic climate control
Setting the temperature
Use temperature controls (
page 173)1
and2 for the left side or7 and8 for
the right side 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).Increasing

Push temperature control2
and/or7.
The automatic climate control system
will correspondingly adjust the interior
air temperature.
Decreasing

Push temperature control1
and/or8.
The automatic climate control system
will correspondingly adjust the interior
air temperature.Adding outside air

Turn thumbwheel8 in dashboard
(page 172) to increase flow of out-
side air through air vents for center, left
and right sides, as well as dashboard
top center and rear passenger com-
partment.
iWhen operating the climate control
system in automatic mode, you will
only rarely need to adjust the tempera-
ture, air volume and air distribution.
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176 Controls in detailAutomatic climate controlAdjusting air distribution
Use the air distribution controls7 and9
(page 172) to separately adjust the air
distribution on each side of the passenger
compartment. The following symbols are
found on the controls:Adjusting manually

Press left or right U button.
The U pops out, the a, Z,
X and Y symbols are visible.
Air distribution can be adjusted manu-
ally.
Adjusting automatically

Press left or right U button again.
The a, Z, X and Y sym-
bols are no longer visible.
The air distribution is adjusted auto-
matically.Windshield fogged on the outside

Switch the windshield wipers on, see
“Windshield wipers” (
page 48).

Switch to manual mode.

Close the air vent at dashboard top
center.

Turn the air distribution control
toa orY.
Symbol
Function
a
Directs air through the center,
side and rear passenger com-
partment air vents
Z
Directs air to the windows
X
Directs air into the entire vehi-
cle interior
Y
Directs air to the footwells
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177 Controls in detail
Automatic climate control
Adjusting air volume
Adjusting manually
Seven blower speeds are available.
Press leftM or rightQ s i d e o f a i r
volume control switch until the re-
quested blower speed is attained.
The display “AUTO” disappears and the
automatic mode is switched off. The
selected blower speed is shown in the
display.
Adjusting automatically

Press left or right U button until it
clicks in.
The a, Z, X and Y sym-
bols are no longer visible.
The air volume is adjusted automatical-
ly.
Maximum cooling MAXCOOL
If the left and right air distribution controls
as well as the airflow volume control are
set toU and there is a high need for
cooling, the display “MAXCOOL” appears.
This provides the fastest possible cooling
of the vehicle interior (when windows and
soft top are closed).
Defrosting
Activating
Press buttonP (
page 173).
The indicator lamp on the button
comes on.
Switch off air recirculation, if selected.

Press button, (
page 173).
The indicator lamp on the button goes
out.

Close center air vents.

Adjust side air vents upwards.
Deactivating

Press buttonP (
page 173).
The indicator lamp on the button goes
out. Defrosting is turned off.
iThese settings should only be selected
for a short time.
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178 Controls in detailAutomatic climate controlAir 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.Activating

Press button, (
page 173).
The indicator lamp on the button
comes on.
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.
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 procedure causes po-
tential danger, the closing of the side win-
dows 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
Please note that the charcoal filter
must be activated (
page 179) for the
air recirculation mode to be activated
automatically.
If you have turned off the air condition-
ing system (
page 181) or the outside
temperature is below 41°F (5°C), the
air recirculation mode will not switch
on automatically.
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179 Controls in detail
Automatic climate control
Deactivating
Press button, (
page 173).
The indicator lamp on the button goes
out.
Charcoal filter
An activated charcoal filter markedly re-
duces bad odors and removes pollutants
from air entering the passenger compart-
ment.
Activating
Press buttone (
page 173).
The indicator lamp on the button
comes on.
iIf you keep button, pressed, the
side windows will return to their previ-
ous position.
iThe air recirculation mode is deactivat-
ed automatically:

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


after five minutes if the air condi-
tioning is turned off


after 30 minutes if the outside tem-
perature is above approximately
41°F (5 °C)
At outside temperatures above 79°F
(26 °C) the system will not automatical-
ly switch back to outside air. A quantity
of outside air is added after approxi-
mately 30 minutes.
iIf you keep buttone pressed, the
side windows will close.
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180 Controls in detailAutomatic climate controlDeactivating
Press buttone (
page 173).
The indicator lamp on the button goes
out.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.
The automatic air recirculation mode does
not function if economy mode ° is se-
lected or if the outside temperature has
fallen below 41°F (5°C).
The activated charcoal filter should be
switched off when windows fog up on the
inside, or if the passenger compartment
needs to be quickly heated or cooled
down.Deactivating the climate control sys-
tem
Deactivating
It is possible to deactivate the automatic
climate control system.
Press buttonM (
page 173) until
the display is cleared.
The climate control system is deacti-
vated.
Reactivating

Press button Q (
page 173).
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 procedure causes po-
tential danger, the closing of the side win-
dows 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.
iWith the automatic climate control sys-
tem deactivated, the air flow and circu-
lation are also switched off.
Only choose this setting temporarily to
prevent the windows from fogging up.
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