2018 MERCEDES-BENZ SL ROADSTER climate settings

Overview of climate control systems
General notes
Observe the settings recommended on the fol-
lowing pages. The windows could otherwise fog
up.
To prevent the windows from fogging up:
Rswitch off climate control only briefly
Rswitch on air-recirculation mode only briefly
Rswitch on the cooling with air dehumidifica-
tion function
Rswitch on the defrost windshield 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 can only be operated when the
engine is running. Optimum operation is only
achieved with the side windows and roof closed.
iWhen the weather is warm, ventilate the
vehicle for a brief period. This will speed up
the cooling process and the desired vehicle
interior temperature will be reached more
quickly.
iIt is possible that the dehumidification func-
tion of the climate control system may be
activated automatically an hour after the
SmartKey has been removed. The vehicle is
then ventilated for 30 minutes to dry the air-
conditioning system.
Control panel for dual-zone automatic climate control
Canada only
:Sets the temperature, left (Ypage 116)
;Sets climate control to automatic (Ypage 116)
=Defrosts the windshield (Ypage 117)
?Switches the residual heat on or off (Ypage 119)
ASwitches cooling with air dehumidification on/off (Ypage 115)
BSwitches the rear window defroster on/off (Ypage 118)
CSwitches the ZONE function on/off (Ypage 117)
DSets the temperature, right (Ypage 116)
EActivates/deactivates climate control (Ypage 115)
FSets the air distribution (Ypage 117)
GSets the airflow (Ypage 117)
Overview of climate control systems113
Climate control

HAdjusts the climate mode settings (Ypage 116)
ISwitches air-recirculation mode on/off (Ypage 118)
USA only
:Sets the temperature, left (Ypage 116)
;Sets climate control to automatic (Ypage 116)
=Defrosts the windshield (Ypage 117)
?Switches the maximum cooling MAX COOL on or off (Ypage 118)
ASwitches cooling with air dehumidification on/off (Ypage 115)
BSwitches the rear window defroster on/off (Ypage 118)
CSwitches the ZONE function on/off (Ypage 117)
DSets the temperature, right (Ypage 116)
EActivates/deactivates climate control (Ypage 115)
FSets the air distribution (Ypage 117)
GSets the airflow (Ypage 117)
HAdjusts the climate mode settings (Ypage 116)
ISwitches air-recirculation mode on/off (Ypage 118)
Optimum use of dual-zone automatic
climate control
Climate control system
The following contains instructions and recom-
mendations to enable you to get the most out of
your 3-zone automatic climate control.
RActivate climate control using the Ãand
¿ buttons on the control panel of the cli-
mate control. The indicator lamps in the Ã
and ¿ buttons light up.
RIn 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 recommen-
ded.
RSet the temperature to 72 ‡ (22 †).
ROnly use the "Windshield defrosting" function
briefly until the windshield is clear again.
ROnly use air-recirculation mode briefly, e.g. if
there are unpleasant outside odors or when in
a tunnel. The windows could otherwise fog up, since no fresh air is drawn into the vehicle in
air-recirculation mode.
RUse the ZONE function to adopt the temper-
ature settings on the driver's side for the
front-passenger side as well. The indicator
lamp in the ábutton goes out.
114Overview of climate control systems
Climate control

RUse 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 deactivated
with the ignition switched off.
RVehicles with COMAND:if you change the
settings of the climate control system, the
climate status display appears for three sec-
onds at the bottom of the screen in the
COMAND display. You will see the current
settings of the various climate control func-
tions.
ECO start/stop function
During automatic engine switch-off, the climate
control system only operates at a reduced capa-
city. If you require full climate control capacity,
the ECO start/stop function can be deactivated
by pressing the ECO button (
Ypage 126).
Operating the climate control sys-
tems
Activating/deactivating climate con-
trol
General notes
When the climate control is switched off, the air
supply and air circulation are also switched off.
The windows could fog up. Therefore, switch off
climate control only briefly
iActivate climate control primarily using the
à button (Ypage 116).
Activating/deactivating
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 122).
XTo activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Airflow and air distribution are set to auto-
matic mode.
or
XPress the ^button.
The indicator lamp in the ^button goes
out. The previously selected settings are
restored.
XTo deactivate: press the^button.
The indicator lamp in the ^button lights
up.
Switching cooling with air dehumidi-
fication on/off
General notes
If you deactivate the "Cooling with air-dehumid-
ification" function, the air inside the vehicle will
not be cooled. The air inside the vehicle will also
not be dehumidified. The windows can fog up
more quickly. Therefore, deactivate the cooling
with air-dehumidification function only briefly.
The "Cooling with air dehumidification" function is only available when the engine is running. The
air inside the vehicle is cooled and dehumidified
according to the temperature selected.
Condensation may drip from the underside of
the vehicle when it is in cooling mode. This is
normal and not a sign that there is a malfunc-
tion.
Activating/deactivating
XTo activate: press the¿button.
The indicator lamp in the ¿button lights
up.
XTo deactivate: press the¿button.
The indicator lamp in the ¿orÁ button
goes out. The "Cooling with air dehumidifica-
tion" function has a delayed switch-off fea-
ture.
The indicator lamp in the ¿button goes
out. The "Cooling with air dehumidification"
function has a delayed switch-off feature.
Operating the climate control systems115
Climate control

Problems with the "Cooling with air dehumidification" function
ProblemPossible causes/consequences andMSolutions
The indicator lamp in the
¿button flashes
three times or remains
off. The "Cooling with air
dehumidification" func-
tion cannot be switched
on.Cooling with air dehumidification has been deactivated due to a mal-
function.
XVisit a qualified specialist workshop.
Setting climate control to automatic
General notes
In automatic mode, the set temperature is main-
tained automatically at a constant level. The
system automatically regulates the temperature
of the dispensed air, the airflow and the air dis-
tribution.
The automatic mode functions optimally when
the "Cooling with air dehumidification" function
is activated. If necessary, cooling with air dehu-
midification can be deactivated.
If you deactivate the "Cooling with air-dehumid- ification" function, the air inside the vehicle will
not be cooled. The air inside the vehicle will also
not be dehumidified. The windows can fog up
more quickly. Therefore, deactivate the cooling
with air-dehumidification function only briefly.
Automatic control
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 122).
XSet the desired temperature.
XTo activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Automatic air distribution and airflow are
activated.
iWhen automatic mode is enabled, the cli-
mate mode can be selected (Ypage 116).
XTo switch to manual mode: press the_
button.
or
XPress the IorK button.
The indicator lamp in the Ãbutton goes
out.
Adjusting the climate mode settings
You can select the following climate mode set-
tings in automatic mode:
FOCUS high airflow, slightly cooler setting
MEDIUM medium airflow, standard setting
DIFFUSE low airflow, slightly warmer and draft- free setting
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 122).
XPress the Ãbutton.
XPress the ñbutton repeatedly until the
desired climate mode appears in the display.
Setting the temperature
Setting the temperature
Different temperatures can be set for the driv-
er's and front-passenger sides.
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 122).
XTurn control :or; counter-clockwise or
clockwise.
Only change the temperature setting in small
increments. Start at 72 ‡ (22 †).
iIf you turn controls :and ;counter-
clockwise to the lowest temperature setting,
air-recirculation mode may switch on auto-
matically, depending on the outside temper-
ature.
116Operating the climate control systems
Climate control

Setting the air distribution
Activating/deactivating
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 122).
XPress the _button repeatedly until the
desired symbol appears in the display.
Air distribution settings
The following air distribution settings can be
selected:
P Directs air through the center and side air
vents
O Directs air through the footwell air vents
S Directs air through the center, side and
footwell vents
¯ Directs air through the defroster vents
b Directs the airflow through the defroster,
center and side air vents (Canada only)
a Directs air through the defroster and
footwell vents
_ Directs the airflow through the defroster
vents, the center and side air vents as
well as the footwell air vents (Canada
only)
iRegardless of the air distribution setting,
airflow is always directed through the side air
vents. The side air vents can only be closed
when the adjuster in the side air vent is turned clockwise.
Setting the airflow
Setting the airflow
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 122).
XTo increase: press theKbutton.
XTo reduce: press theIbutton.
Switching the ZONE function on/off
XTo 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-passenger
side.
XTo switch off:
press theábutton.
The indicator lamp in the ábutton goes
out. The temperature setting for the driver's
side is adopted for the front-passenger side.
Defrosting the windshield
General notes
You can use this function to defrost the wind-
shield or to defrost the inside of the windshield
and the side windows.
Switch off the "Windshield defrosting" function
as soon as the windshield is clear again.
Switching the "windshield defrosting"
function on or off
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 122).
XTo switch on: press the¬button.
The indicator lamp in the ¬button lights
up.
The climate control system switches to the
following functions:
Rhigh airflow
Rhigh temperature
Rair distribution to the windshield and front
side windows
Rair-recirculation mode off
XTo switch off: press the¬button.
The indicator lamp in the ¬button goes
out. The previously selected settings are
restored. Air-recirculation mode remains
deactivated.
or
XPress the Ãbutton.
The indicator lamp in the ¬button goes
out. Airflow and air distribution are set to
automatic mode.
or
XTurn temperature control :orD counter-
clockwise or clockwise (Ypage 113).
or
XPress the KorI button.
Operating the climate control systems117
Climate control

MAX COOL maximum cooling
The MAX COOL function is only available in vehi-
cles for the USA.
MAX COOL is only operational when the engine
is running.
XTo activate:press theÙbutton.
The indicator lamp in the button lights up.
XTo deactivate: press theÙbutton.
The indicator lamp in the button goes out. The
previously selected settings are restored.
When you activate MAX COOL, climate control
switches to the following functions:
Rmaximum cooling
Rmaximum airflow
Rair-recirculation mode on
Defrosting the windows
Windows fogged up on the inside
XActivate the ¿cooling with air dehumidi-
fication function.
XActivate the Ãmode button.
XIf the windows continue to fog up, activate the
¬ "Windshield defrosting" function.
iYou should only select this setting until the
windshield is clear again.
Windows fogged up on the outside
XActivate the windshield wipers.
XPress the _button repeatedly until the
P orO symbol appears in the display.
iYou should only select this setting until the
windshield is clear again.
Rear window defroster
General notes
The rear window defroster has a high current
draw. You should therefore switch it off as soon
as the rear window is clear. Otherwise, the rear window defroster switches off automatically
after several minutes.
If the battery voltage is too low, the rear window
defroster may switch off.
Activating/deactivating
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 122).
XPress the ¤button.
The indicator lamp in the ¤button lights
up or goes out.
Problems with the rear window defroster
ProblemPossible causes/consequences and MSolutions
The rear window
defroster has deactiva-
ted prematurely or can-
not be activated.The on-board voltage is too low because too many electrical consum-
ers are switched on.
XSwitch off any consumers that are not required, e.g. reading lamps,
interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window defroster
can be activated again.
Switching air-recirculation mode
on/off
General notes
If you switch on air-recirculation mode, the win-
dows can fog up more quickly, in particular at
low temperatures. Only use air-recirculation
mode briefly to prevent the windows from fog-
ging up.
Activating/deactivating
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 122).
XTo activate: press thegbutton.
The indicator lamp in the gbutton lights
up.
iAir-recirculation mode is automatically acti-
vated at high levels of pollution or at high out-
118Operating the climate control systems
Climate control

Setting the center air vents
XTo open the center air vents:turn the
adjuster in one of center air vents :counter-
clockwise.
XTo close the center air vents: turn the
adjuster in one of center air vents :clock-
wise until it engages.
Setting the side air vents
:Side window defroster vent
;Side air vent
XTo open a side air vent: turn the adjuster in
the side air vent ;to the left.
XTo close a side air vent: turn the adjuster in
the side air vent ;to the right until it
engages.
Setting the glove box air vent
!
Close the air vent when heating the vehicle.
At high outside temperatures, open the air
vent and activate the "cooling with air dehu-
midification" function. Otherwise, tempera- ture-sensitive items stored in the glove box
could be damaged.
:Air vent control
;Air vent
When the climate control system is activated,
the glove box can be ventilated, for instance to
cool its contents. The level of airflow depends on the airflow and air distribution settings.
XTo open or close: turn thumbwheel:to the
right or left.
Setting the blower output of the AIR-
SCARF vents
GWARNING
When AIRSCARF is switched on, very hot air
can flow from the vents in the head restraints. This could result in burns in the immediate
vicinity of the air vents. There is a risk of injury.
Reduce the heater output before it becomes
too hot.
You can adjust the blower output of AIRSCARF
vents :using the AIRSCARF button
(
Ypage 100).
120Setting the air vents
Climate control