2004 MERCEDES-BENZ SLK CLASS Owners Manual

105 Controls in detail
Climate control
Decreasing
Turn the temperature control5
slightly downwards.
A blue marking will be visible and the
climate control system will correspond-
ingly adjust the interior air tempera-
ture.
Adjusting air volume
Use air volume control9 (
page 103) to
adjust the air volume. The following sym-
bols are found on the control:
Adjusting air distribution
Use air distribution control6
(page 103) to adjust the air distribution.
The following symbols are found on the
control:
Symbol
Function
0
No ventilation
between0
andQ
Ventilation without a blow-
er, depending on the
speed driven
between1
and5
Ventilation with blower
Symbol
Function
cP
Directs air to the windows
b
Directs air into the passen-
ger compartment
d
Directs air to the footwells
a
Directs air through the
center, side and rear pas-
senger compartment air
vents

106 Controls in detailClimate 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 buttonÐ (
page 102).
The indicator lamp on theÐ button
comes on.Deactivating

Press buttonÐ (
page 102).
The indicator lamp on theÐ button
goes out.
The air recirculation mode is deactivated
automatically:


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


after five minutes if the air conditioning
is turned off


after 30 minutes if the outside temper-
ature is above approximately 41°F
(5 °C)
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.
Air conditioning
The air conditioning is operational while
the engine is running and cools the interior
air to the temperature set by the operator.
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.iThe air recirculation mode is activated
automatically at high outside tempera-
tures.
iCondensation may drip out from under-
neath the vehicle. This is normal and
not an indication of a malfunction.

107 Controls in detail
Climate control
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± (
page 102).
The indicator lamp on the button±
lights up.Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.

Press button± again (
page 102).
The indicator lamp on the ±button
goes out.
The air conditioning uses the refrigerant
R134a. This refrigerant is free of CFCs
which are harmful to the ozone layer.
Residual heat
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
Turn the key in the steering lock to
position1or0, or remove it from the
starter switch.

Press buttonÐ (
page 102).
The indicator lamp on the buttonÐ
comes on.
Warning!
G
While driving, deactivate the air conditioning
only temporarily to prevent window fogging.

108 Controls in detailClimate controlDeactivating
Press buttonÐ (
page 102).
The indicator lamp on the buttonÐ
goes out.
The residual heat is automatically turned
off:


when the ignition is switched on


after about 30 minutes


if the battery voltage drops
Basic settings
Heater
Select temperature for each side of the
passenger compartment with tempera-
ture controls1.

Select air volume with air volume
control2, set at least to position2 to
prevent window fogging.

Set air distribution control3 to posi-
tion shown above.

Turn side window defroster vents
(page 103) to the detent position.

Open center air vents (
page 103) as
desired.
iHow long the system will provide heat-
ing depends on the coolant tempera-
ture and the temperature set by the
operator. The blower will run at speed
setting1 regardless of the air volume
control setting.

109 Controls in detail
Climate control
Air conditioning
Select temperature for each side of the
passenger compartment with tempera-
ture controls1.

Select air volume with air volume
control2, set at least to position1 to
start the air conditioning.

Set air distribution control3 to
positiona.

Open center air vents (
page 103).

Open left and right side air vents.
Special settings Defrosting

Set temperature controls1, air vol-
ume control2 and air distribution
control3 to positionP.

Close center air vents (
page 103).

Open left and right side air vents
(page 103).

Turn side window defroster vents
(page 103) to the detent position.
iUse special settings only for a short
duration.

110 Controls in detailClimate controlDefogging windows
Windows fogged up on inside
Press button± to switch on the air
conditioning.
The indicator lamp on button±
goes out.

Press buttonÐ to switch off the air
recirculation.
The indicator lamp on buttonÐ
goes out.

Increase air volume with air volume
control2.

Set air distribution control3 to
positionc.

Close center air vents.

Close left and right side air vents.

Turn side window defroster vents to the
detent position.
Windshield fogged up on outside

Switch on the windshield wipers
(page 44).

Set air distribution control3 to
positiond ora.Deactivating the climate control
system
Deactivating
Set air volume control2 to position0.
The fresh air supply to the passenger
compartment is shut off.
Reactivating

Set air volume control2 to any speed.
The fresh air supply to the passenger
compartment is switched on.Warning!
G
While driving, deactivate the climate control
only temporarily to prevent window fogging.

111 Controls in detail
Audio system
Audio system
Audio and telephone, operation
These instructions are intended to help
you become acquainted with your
Mercedes-Benz car radio. They contain
useful tips and a detailed description of the
user functions.
Operating safety
Warning!
G
In order to avoid distraction which could
lead to an accident, the driver should enter
system settings with the vehicle at a stand-
still and operate the systems only when road
and traffic conditions permit. Always pay full
attention to traffic conditions first before
operating system controls while driving.
Bear in mind that at a speed of just 30 mph
(approximately 50 km / h), your car is cover-
ing a distance of approximately 50 feet (ap-
proximately 14 m) every second.
Warning!
G
Any alterations made to electronic compo-
nents can cause malfunctions.
The radio, cassette deck, CD changer*, tele-
phone* and voice control system* are inter-
connected. When one of the components is
not operational or has not been
removed / replaced properly, the function of
other components may be impaired.
This conditions might seriously impair the
operating safety of your vehicle.
We recommend that you have any service
work on electronic components carried out
by an authorized Mercedes-Benz Center.

112 Controls in detailAudio systemOperating and display elements