2014 MERCEDES-BENZ SLK ROADSTER Owners Manual

Useful information
i This Owner's Manual describes all mod-
els, series and optional equipment for your
vehicle that were available at the time of
going to press. National variations are pos- sible. Note that your vehicle may not be
equipped with all of the functions descri-
bed. This is also the case for systems and
functions relevant to safety.
i Read the information on qualified special-
ist workshops: (Y page 24). Overview of climate control systems
General notes
Observe the settings recommended on the
following pages. The windows could other-
wise mist up.
To prevent the windows from misting up:
R switch off climate control only briefly
R switch on air-recirculation mode only
briefly
R switch on the cooling with air dehumidifi-
cation function
R switch on the "demist windscreen" function
briefly, if required
Climate control regulates the temperature
and the humidity in the vehicle interior and
filters undesirable substances out of the air.
Climate control is only operational when the
engine is running. Optimum operation is only
achieved when the side windows and the roof
are closed.
The residual heat function can only be acti-
vated or deactivated with the ignition
switched off (Y page 135).
i Ventilate the vehicle for a brief period
during warm weather. This will speed up the
cooling process, and the desired vehicle
interior temperature will be reached more
quickly. i
The integrated filter filters out most par-
ticles of dust and soot and completely fil-
ters out pollen. It also reduces gaseous pol-
lutants and odours. A clogged filter reduces the amount of air supplied to the vehicle
interior. For this reason, you should alwaysobserve the interval for replacing the filter,
which is specified in the Service Booklet. As this depends on environmental conditions,
e.g. heavy air pollution, the interval may be shorter than stated in the Service Booklet. 126
Overview of climate control systemsClimate control

Control panel for air-conditioning system
:
To set the temperature (Y page 131)
; To activate/deactivate the residual heat function (Y page 135)
= To set the air distribution (Y page 132)
? To demist the windscreen (Y page 133)
A To activate/deactivate cooling with air dehumidification (Y page 129)
B To activate/deactivate air-recirculation mode (Y page 134)
C To set the airflow (Y page 132)
D To switch the rear window heating on/off (Y page 133)Notes on using the air-conditioning
system
Air-conditioning system Below, you can find a number of tips and rec-
ommendations for optimum use of the air-
conditioning system.
R Switch on cooling with air dehumidification
using the ¿button. The indicator lamp
in the ¿button lights up.
R Set the temperature to 22 †.
R Recommendation for air distribution in
winter: adjust the Oand¯ settings.
Recommendation for air distribution in summer: adjust the Psetting. R
Only use the "Windscreen demisting" func-
tion briefly until the windscreen is clear
again.
R Only use air-recirculation mode briefly, e.g.
if there are unpleasant outside odours or
when in a tunnel. The windows could oth-
erwise mist up as no fresh air is drawn into
the vehicle in air-recirculation mode.
ECO start/stop function During automatic engine switch-off, the cli-
mate control only operates at a reduced capa-
city. If you require full climate control capa-
city, the ECO start/stop function can be
deactivated by pressing the ECO button
(Y page 148). Overview of climate control systems
127Climate control

Control panel for THERMOTRONIC automatic climate control (2-zone)
:
To set the temperature, left (Y page 131)
; To demist the windscreen (Y page 133)
= To switch the ZONE function on/off
? To activate/deactivate cooling with air dehumidification (Y page 129)
To activate/deactivate the residual heat function (Y page 135)
A To switch the rear window heating on/off (Y page 133)
B To set the temperature, right (Y page 131)
C To activate/deactivate air-recirculation mode (Y page 134)
D To set the air distribution (Y page 132)
E To increase the airflow (Y page 132)
F To reduce the airflow (Y page 132)
G To switch climate control on/off (Y page 129)
H To set climate control to automatic mode (Y page 131)Optimum use of THERMOTRONIC
automatic climate control
Automatic climate control The following contains instructions and rec-
ommendations to enable you to get the most
out of your THERMOTRONIC automatic cli-
mate control.
R Activate climate control using the Ãand
Á buttons on the control panel of the
climate control. The indicator lamps in the
à andÁ buttons light up.
R Set the temperature to 22 †. R
Only use the "Windscreen demisting" func-
tion briefly until the windscreen is clear
again.
R Only use air-recirculation mode briefly, e.g.
if there are unpleasant outside odours or
when in a tunnel. The windows could oth-
erwise mist up, as no fresh air is drawn into
the vehicle in air-recirculation mode.
R Use the ZONE function to adopt the tem-
perature settings on the driver's side for 128
Overview of climate control systemsClimate control

the front-passenger side as well. The indi-
cator lamp in the ábutton goes out.
R Use the residual heat function if you want to
heat or ventilate the vehicle interior when
the ignition is switched off. The residual
heat function can only be activated or deac-
tivated with the ignition switched off.
ECO start/stop function During automatic engine switch-off, the cli-
mate control only operates at a reduced capa- city. If you require full climate control capa-
city, the ECO start/stop function can be
deactivated by pressing the ECO button
(Y page 148). Operating the climate control system
Switching climate control on/off
General notes When the climate control is switched off, the
air supply and air circulation are also
switched off. The windows could mist up.
Therefore, only switch off climate control
briefly.
i Activate climate control primarily using
the à button (Y page 131).
Air-conditioning system X
Turn the key to position 2in the ignition
lock (Y page 141).
X To switch on: turn airflow control C
clockwise to the desired position (except
position 0) (Ypage 127).
X To switch off: turn airflow control Canti-
clockwise to position 0(Ypage 127). THERMOTRONIC automatic climate
control X
Turn the key to position 2in the ignition
lock (Y page 141).
X To switch on: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Airflow and air distribution are set to
automatic mode.
or
X Press the ^button.
The indicator lamp in the ^button goes
out. The previous settings are reactivated.
X To switch off: press the^button.
The indicator lamp in the ^button lights
up. Activating/deactivating the cooling
with air dehumidification function
General notes If you deactivate the "Cooling with air-dehu-
midification" function, the air inside the vehi-
cle will not be cooled. The air inside the vehi-
cle will also not be dehumidified. The win-
dows can mist up more quickly. Therefore,
only switch off cooling with air dehumidifica-
tion for a short period.
The "Cooling with air dehumidification" func-
tion is only available when the engine is run-
ning. The air inside the vehicle is cooled and
dehumidified according to the temperature
selected.
Condensation may drip from the underside of the vehicle when cooling mode is active. Thisis normal and not a sign that there is a mal-
function. Operating the climate control system
129Climate control

Activating/deactivating
X
To switch on: press the¿orÁ but-
ton.
The indicator lamp in the ¿orÁ
button lights up.
X To switch off: press the¿orÁ
button.
The indicator lamp in the ¿orÁ
button goes out. The "Cooling with air dehu- midification" function has a delayed switch-
off feature. 130
Operating the climate control systemClimate cont
rol

Problems with the "Cooling with air dehumidification" function
Problem
Possible causes/consequences and
M
MSolutions The indicator lamp in
the
¿/Á button
flashes three times or
remains off. The cool-
ing with air dehumidifi-
cation system cannot
be switched on. Cooling with air dehumidification has been deactivated due to a
malfunction.
X Visit a qualified specialist workshop. Setting climate control to automatic
mode
General notes Automatic mode is only available with
THERMOTRONIC automatic air conditioning.
In automatic mode, the set temperature is
maintained automatically at a constant level. The system automatically regulates the tem-
perature of the dispensed air, the airflow and
the air distribution.
The automatic mode functions optimally
when the "Cooling with air dehumidification"
function is activated. If desired, cooling with
air dehumidification can be deactivated.
If you deactivate the "Cooling with air-dehu-
midification" function, the air inside the vehi-
cle will not be cooled. The air inside the vehi- cle will also not be dehumidified. The win-
dows can mist up more quickly. Therefore,
only switch off cooling with air dehumidifica-
tion for a short period.
Activating/switching X
Turn the key to position 2in the ignition
lock (Y page 141).
X Set the desired temperature.
X To activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Automatic air distribution and airflow
are activated. X
To switch to manual mode: press the
_ button.
or X Press the IorK button.
The indicator lamp in the Ãbutton goes
out. Setting the temperature
Air-conditioning system X
Turn the key to position 2in the ignition
lock (Y page 141).
X To increase/reduce: turn control:
clockwise or anti-clockwise (Y page 127).
Only change the temperature setting in
small increments. Start at 22 †.
i If you turn control
:anti-clockwise to
the lowest temperature setting, air-recircu- lation mode may activate automatically,
depending on the outside temperature.
THERMOTRONIC automatic climate
control Different temperatures can be set for the
driver's and front-passenger sides.
X Turn the key to position 2in the ignition
lock (Y page 141).
X To increase/reduce: turn control:orB
clockwise or anti-clockwise (Y page 128).
Only change the temperature setting in
small increments. Start at 22 †. Operating the climate control system
131Climate control

i
If you turn controls
:and Banti-clock-
wise to the lowest temperature setting, air- recirculation mode may activate automati-
cally, depending on the outside tempera-
ture. Setting the air distribution
Air-conditioning system X
Turn the key to position 2in the ignition
lock (Y page 141).
X Press one or more of the P,O,¯
buttons.
The corresponding indicator lamp comes
on.
The air distribution can be set to the following positions:
¯ Directs the airflow through the demis-
ter vents
O Directs the airflow through the foot-
well air vents
P Directs the airflow through the centre
and side air vents
i You can also activate several of the air
distribution settings simultaneously. In
order to do this, press several of the air
distribution buttons. The air is then routed
through different air vents.
THERMOTRONIC automatic climate
control X
Turn the key to position 2in the ignition
lock (Y page 141).
X Press the _button repeatedly until the
desired symbol appears in the display.
The air distribution can be set to the following positions:
P Directs the airflow through the centre
and side air vents
O Directs the airflow through the foot-
well air vents S
Directs the airflow through the centre
and side air vents as well as the foot-
well air vents
¯ Directs the airflow through the demis-
ter vents
b Directs the airflow through the demis-
ter, centre and side air vents
a Directs the airflow through the foot-
well and demister vents
_ Directs the airflow through the demis-
ter, centre, side and footwell air vents
i Regardless of the air distribution setting,
airflow is always directed through the side
air vents. You can only close the side air
vents by fully closing the adjuster on the
side air vents (Y page 136). Setting the airflow
Air-conditioning system X
Turn the key to position 2in the ignition
lock (Y page 141).
X To increase/reduce: turn controlC
clockwise or anti-clockwise (Y page 127).
THERMOTRONIC automatic climate
control X
Turn the key to position 2in the ignition
lock (Y page 141).
X To increase/reduce: press theKor
I button. Switching the ZONE function on/off
This function is only available with
THERMOTRONIC automatic climate control.
X To switch on: press theábutton.
The indicator lamp in the ábutton lights
up. The temperature setting for the driver's 132
Operating the climate control systemClimate control

side is not adopted for the front-passenger
side.
X To switch off: press theábutton.
The indicator lamp in the ábutton goes
out. The temperature setting for the driv-
er's side is adopted for the front-passenger
side. Demisting the windscreen
General notes You can use this function to defrost the wind-
screen or to demist the inside of the wind-
screen and the side windows.
Switch off the "Windscreen demisting" func-
tion as soon as the windscreen is clear again.
Switching the "Demisting windscreen"
on/off X
Turn the key to position 2in the ignition
lock (Y page 141).
X To activate: press the¬button.
The indicator lamp in the ¬button lights
up.
The climate control system switches to the
following functions:
R high airflow
R high temperature
R air distribution to the windscreen and
front side windows
R air-recirculation mode off
X To deactivate: press the¬button.
The indicator lamp in the ¬button goes
out. The previous settings are reactivated.
Air-recirculation mode remains deactiva-
ted.
or
X THERMOTRONIC automatic climate con-
trol: press the Ãbutton.
The indicator lamp in the ¬button goes
out. Airflow and air distribution are set to
automatic mode. Demisting the windows
Windows misted up on the inside X
Activate the ¿/Ácooling with air
dehumidification function.
X THERMOTRONIC automatic air condition-
ing: activate the Ãmode button.
X If the windows continue to mist up, activate
the ¬ "Windscreen demisting" function.
i You should only select this setting until
the windscreen is clear again.
Windows misted up on the outside X
Activate the windscreen wipers.
X Air conditioning: press the PorO
button.
X Automatic air conditioning
THERMOTRONIC: press the _button
until the PorO symbol appears in
the display.
i You should only select this setting until
the windscreen is clear again. Rear window heating
General notes The rear window heating has a high current
draw. You should therefore switch it off as
soon as the window is clear. It otherwise
switches off automatically after several
minutes.
If the battery voltage is too low, the rear win-
dow heating may switch off.
Activating/deactivating X
Turn the key to position 2in the ignition
lock (Y page 141).
X Press button ¤.
The indicator lamp in the ¤button lights
up or goes out. Operating the climate control system
133Climate control