MERCEDES-BENZ SL ROADSTER 2012 Owners Manual

Problems with the windscreen wipers
Problem
Possible causes/consequences and
M
MSolutions The windscreen wipers
are jammed. Leaves or snow, for example, may be obstructing the windscreen
wiper movement. The wiper motor has been deactivated.
X For safety reasons, you should remove the key from the ignition
lock.
or
X Switch off the engine using the Start/Stop button and open the
driver's door.
X Remove the cause of the obstruction.
X Switch the windscreen wipers back on. The windscreen wipers
fail completely. The windscreen wiper drive is malfunctioning.
X Select another wiper speed on the combination switch.
X Have the windscreen wipers checked at a qualified specialist
workshop. 138
Windscreen wipersLights and windscreen wipers

Useful information
............................140
Overview of climate control sys-
tems ................................................... 140
Operating the climate control sys-
tem ..................................................... 142
Adjusting the air vents .....................150 139Climate control

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 34). Overview of climate control systems
Important safety 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 149).
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
An hour after the key has been removed,
it is possible that the residual heat function may be activated automatically in order to
dry the air-conditioning system. The vehicleis then ventilated for 30 minutes to dry the air-conditioning system. 140
Overview of climate control systemsClimate control

Control panel for THERMOTRONIC automatic climate control (2-zone)
:
To set the temperature, left (Y page 145)
; To set climate control to automatic mode (Y page 144)
= To demist the windscreen (Y page 146)
? To activate/deactivate the residual heat function (Y page 149)
A To activate/deactivate cooling with air dehumidification (Y page 142)
B To switch the rear window heating on/off (Y page 147)
C To switch the ZONE function on/off (Y page 146)
D To set the temperature, right (Y page 145)
E To switch climate control on/off (Y page 142)
F To set the air distribution (Y page 145)
G To set the airflow (Y page 146)
H To adjust the airflow (Y page 144)
I To activate/deactivate air-recirculation mode (Y page 148)Information about using
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
¿ buttons on the control panel of the climate control. The indicator lamps in
the
à and¿ buttons light up.
R In automatic mode, the ñbutton on the
climate control panel may be used to addi- tionally adjust the airflow (FOCUS/
MEDIUM/DIFFUSE). The MEDIUM level is
recommended.
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 Overview of climate control systems
141Climate control

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
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.
R Vehicles with COMAND Online: if you
change the settings of the climate control
system, the climate status display appears for three seconds at the bottom of the
screen in the COMAND display. See also
the separate COMAND Online operating
instructions. You will see the current set-
tings of the various climate control func-
tions.
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 160). 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 144). Activating/deactivating X
Turn the key to position 2in the ignition
lock (Y page 155).
X To switch on: press theÃbutton on
the control panel for the climate control.
The indicator lamp in the Ãbutton lights
up. Airflow and air distribution are set to
automatic mode.
or
X Press the ^button on the control panel
for the climate control.
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. 142
Operating the climate control systemClimate control

Activating/deactivating
Example:
¿button
X To switch on: press the¿button.
The indicator lamp in the ¿button lights
up.
X To deactivate: press the¿button.
The indicator lamp in the ¿button goes
out. The "Cooling with air dehumidification"
function has a delayed switch-off feature. Operating the climate control system
143Climate control

Problems with the "Cooling with air dehumidification" function
Problem
Possible causes/consequences and
M
MSolutions The indicator lamp in
the
¿ button
flashes three times or
goes out. The cooling
with air dehumidifica-
tion 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 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 155).
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.
i When automatic mode is enabled the air-
flow can be selected (Y page 144).
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 airflow
In automatic mode you can select the follow- ing airflow settings:
FOCUS high airflow that is set slightly cooler
MEDIUM medium airflow, standard setting
DIFFUSE low airflow that is set slightly warmer and with less of a draught 144
Operating the climate control systemClimate control

Example:
ñbutton
X Turn the key to position 2in the ignition
lock (Y page 155).
X Press the Ãbutton.
X Press the ñbutton repeatedly until the
required airflow setting appears in the dis-
play. Setting the temperature
Switching on/off 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 155).
X Turn controls :orD clockwise or anti-
clockwise (Y page 141).
Only change the temperature setting in
small increments. Start at 22 †.
i If you turn controls
:and Danti-clock-
wise to the lowest temperature setting, air- recirculation mode may activate automati- cally, depending on the outside tempera-
ture. Setting the air distribution
Activating/deactivating X
Turn the key to position 2in the ignition
lock (Y page 155).
X Press the _button repeatedly until the
desired symbol appears in the display.
Air distribution settings 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 vents, the centre and side air vents
as well as the footwell air vents
i Regardless of the air distribution setting,
airflow is always directed through the side Operating the climate control system
145Climate control

air vents. The side air vents can only be
closed when the controls on the side air
vents are turned downwards. Setting the airflow
Activating/deactivating X
Turn the key to position 2in the ignition
lock (Y page 155).
X To increase: press theKbutton.
X To reduce: press theIbutton. Switching the ZONE function on/off
X
To switch on: press theábutton.
The indicator lamp in the ábutton lights
up. The temperature setting for the driver's side is not adopted for the front-passengerside.
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 Example:
¬button
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 155).
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. 146
Operating the climate control systemClimate control

Air-recirculation mode remains deactiva-
ted.
or
X Press the Ãbutton.
The indicator lamp in the ¬button goes
out. Airflow and air distribution are set to
automatic mode.
or X Turn the temperature controls on the left or
the right on the climate control panel clock- wise or anti-clockwise.
Turn temperature controls :orD clock-
wise or anti-clockwise (Y page 141).
or
X Press the KorI button. Demisting the windows
Windows misted up on the inside X
Activate the ¿cooling with air dehu-
midification function.
X 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 Press the _button repeatedly until the
P orO symbol appears in the dis-
play.
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 155).
X Press button ¤.
The indicator lamp in the ¤button lights
up or goes out. Operating the climate control system
147Climate control