climate control MERCEDES-BENZ R-Class 2011 W251 User Guide

FunctioniNotes/tipsNSets the temperatureSet the temperature to 72 ‡ (22 †).OSets the rear-compartment
climate control to automaticPDirects the airflow through the
rear air ventsQDirects the airflow through the
footwell ventsRSwitches rear-compartment
climate control on/offSReduces the airflow
For Canada only
Functioni Notes/tipsFront control panel:Sets the temperature, leftSet the temperature to 72 ‡ (22 †).;Sets climate control to
automaticActivate climate control using the à and Á
buttons. The indicator lamps in the à and Á
buttons light up.=Directs the airflow through the
defroster vents, left136Overview of climate control systemsClimate control
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FunctioniNotes/tips?Defrosts the windshieldOnly use the "defrosting" function briefly until the
windshield is clear again.AIncreases the airflowBSwitches the rear window
heating on/offCDirects the airflow through the
defroster vents, rightDOperates the rear-
compartment climate control
via the front control panelESets the temperature, rightSet the temperature to 72 ‡ (22 †).FSwitches climate control on/
offActivate climate control using the à and Á
buttons. The indicator lamps in the à and Á
buttons light up.GDirects the airflow to the
footwells and side air vents,
rightHDirects the airflow through the
center and side air vents, rightISwitches cooling with air
dehumidification on/offActivate climate control using the à and Á
buttons. The indicator lamps in the à and Á
buttons light up.Switches the residual heat
function on/offUse 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.JDisplayKReduces the airflowLActivates/deactivates air-
recirculation modeMDirects the airflow through the
center and side air vents, leftNDirects the airflow to the
footwells and side air vents,
leftOverview of climate control systems137Climate controlBA 251 USA, CA Edition A 2011; 1; 3, en-USd2sboikeVersion: 3.0.3.52010-04-16T14:31:55+02:00 - Seite 137Z

FunctioniNotes/tipsOInterior temperature sensorPSwitches the MONO function
on/offUse the MONO function if you want to adopt the
temperature, air distribution and airflow settings
from the driver's side for all climate control zones.
The indicator lamp in the º button lights up.Rear control panelQIncreases the airflowRSets the temperatureSet the temperature to 72 ‡ (22 †).SSets the rear-compartment
climate control to automaticTDirects the airflow through the
rear air ventsUDirects the airflow through the
footwell ventsVSwitches rear-compartment
climate control on/offWReduces the airflowOperating climate control systems
Switching climate control on/off
Important information
GWarning!
When the climate control system is
deactivated, the outside air supply and
circulation are also deactivated. Only choose
this setting for a short time. Otherwise the
windows could fog up, impairing visibility and
endangering you and others.
i Activate climate control primarily using
the à button ( Y page 140).
Activating/deactivating the front
climate control using the front control
panelXTurn the key to position 2 in the ignition
lock.XTo activate: press the à button.
The indicator lamp in the à button lights
up. Airflow and air distribution are set to
automatic mode.
or
XPress the ^ button.
The indicator lamp in the ^ button goes
out. The previously selected settings come
into effect again.XTo deactivate: press the ^ button.
The indicator lamp in the ^ button lights
up.138Operating climate control systemsClimate control
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Activating/deactivating the rear-
compartment climate control using the
front control panel (dual-zone
automatic climate control)XTurn the key to position 2 in the ignition
lock.XTo activate/deactivate: press the ±
button ( Y page 133).
The indicator lamp in the ± button lights
up or goes out.
Activating/deactivating the rear-
compartment climate control using the
front control panel (multi-zone
automatic climate control)
For USA only:
XTurn the key to position 2 in the ignition
lock.XTo activate/deactivate: press the ±
button ( Y page 134).
The indicator lamp in the ± button lights
up or goes out.
For Canada only:
XTurn the key to position 2 in the ignition
lock.XTo activate: press the Y button
( Y page 134).
ON and MODE are shown in the multi-zone
automatic climate control display behind
the Y symbol. The MODE display goes
out after three seconds. The display
switches back to the standard display.XTo deactivate: press the Y button
( Y page 134).
MODE is shown in the display behind the
Y symbol.XPress the ^ button ( Y page 134).
OFF is shown in the display behind the
Y symbol.Activating/deactivating the rear-
compartment climate control using the
rear control panel (multi-zone
automatic climate control) XTurn the key to position 2 in the ignition
lock.XActivate multi-zone automatic climate
control with the front control panel.XTo activate: press the à button.
The indicator lamp in the à button lights
up.XTo deactivate: press the ^ button.
The indicator lamp in the ^ button lights
up.
Switching cooling with air
dehumidification on/off
Important information
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.
GWarning
If you switch off the cooling function, the
vehicle will not be cooled when weather
conditions are warm. The windows can fog up
more quickly. Window fogging may impair
visibility and endanger you and others.
Condensation may drip from the underside of
the vehicle when automatic climate control is
in cooling mode. This is normal and not a sign
that there is a malfunction.
i The cooling with air dehumidification
function uses refrigerant R134a. This
coolant does not contain
chlorofluorocarbons, and therefore does
not damage the ozone layer.
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Activating/deactivating
! If the cooling with air dehumidification
does not switch on, it is possible that the
climate control system has lost coolant.
Have the cooling with air dehumidification
checked at a qualified specialist workshop.
XTo switch on: press the Á button.
The indicator lamp in the Á button lights
up.XTo switch off: press the Á button.
The indicator lamp in the Á button goes
out. The cooling with air dehumidification
function has a delayed switch-off feature.
Problems with the "cooling with air
dehumidification" function
If the indicator lamp in the Á button does
not go out when switched off, the cooling with
air dehumidification function is switched off
due to a malfunction. You can no longer
activate the cooling with air dehumidification
function.
XConsult a qualified specialist workshop.
Setting climate control to automatic
GWarning
If you switch off the cooling function, the
vehicle will not be cooled when weather
conditions are warm. The windows can fog up
more quickly. Window fogging may impair
visibility and endanger you and others.
In automatic mode, the set temperature is
maintained automatically at a constant level.
The system automatically regulates the
temperature of the dispensed air, the airflow
and the air distribution.
Automatic mode will achieve optimal
operation if cooling with air dehumidification
is also activated. If desired, cooling with air
dehumidification can be deactivated.
Controlling the front climate control
using the front control panelXTurn the SmartKey to position 2 in the
ignition lock.XSet the desired temperature.XTo activate: press the à button.
The indicator lamp in the à button lights
up. Automatic air distribution and airflow
are activated.XTo deactivate: press the K or I
button.
The indicator lamp in the à button goes
out. Automatic airflow is deactivated and
the airflow is controlled according to the
level set. Automatic air distribution
remains activated.
or
XPress the Z, M , ¯ , \ , P ,
c or O button.
The indicator lamp in the à button goes
out. Automatic air distribution is
deactivated. Air distribution is controlled
according to the position set. Automatic
airflow remains activated.
Controlling the rear-compartment
climate control automatically using the
rear control panel
XTurn the SmartKey to position 2 in the
ignition lock.XActivate multi-zone automatic climate
control using the front control panel.XSet the desired temperature.XTo activate: press the à button.
The indicator lamp in the à button lights
up. Automatic air distribution and airflow
are activated.XTo deactivate: press the K or I
button.
Automatic airflow is deactivated and the
airflow is controlled according to the level140Operating climate control systemsClimate control
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set. Automatic air distribution remains
activated.
or
XPress one of the M or O buttons.
Automatic air distribution is deactivated.
Air distribution is controlled according to
the position set. Automatic airflow remains
activated.
Setting the temperature
Dual-zone automatic climate control
Different temperatures can be set for the
driver's and front-passenger sides.
XTurn the SmartKey to position 2 in the
ignition lock.XTo increase/reduce: turn controls : and
C clockwise or counter-clockwise
( Y page 133).
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †).
Multi-zone automatic climate control
Climate zones of multi-zone automatic climate
control
You can select different temperature settings
for the driver's and front-passenger sides as
well as for the rear compartment.
XTo increase/reduce the front-
compartment temperature using the front control panel: turn the SmartKey in
the ignition lock to position 2.XTurn thumbwheels : and C16
/E 17
clockwise or counter-clockwise
( Y page 134).
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †).
For USA only:
XTo increase/reduce the rear-
compartment temperature using the
front control panel: turn the SmartKey in
the ignition lock to position 2.XPress the ± button.XTurn control C clockwise or counter-
clockwise ( Y page 134).
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †).
For Canada only:
XTo increase/reduce the rear-
compartment temperature using the
front control panel: turn the SmartKey in
the ignition lock to position 2.XPress the Y button.
The display changes to rear-compartment
climate control.XTurn control E clockwise or counter-
clockwise ( Y page 134).
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †).
i To return to the standard display, press
the Y button.
i The rear display changes to the standard
display automatically after three seconds.
XTo increase/reduce the temperature in
the rear compartment using the rear
control panel: turn the SmartKey in the
ignition lock to position 2.XTurn thumbwheel N16
/R 17
clockwise or
counter-clockwise ( Y page 134).
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †).16 USA only.
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Setting the air distribution
Multi-zone automatic climate control: you can
set the air distribution individually for the
driver's and front-passenger sides. 18
Front control unit:Zdirects the airflow through the
defroster ventsMdirects the airflow through the
defroster vents¯directs the airflow through the
defroster ventscdirects the airflow through the footwell
and side air ventsOdirects the airflow through the footwell
and side air vents\directs the airflow through the center
and side air ventsPdirects the airflow through the center
and side air vents
Rear control panel:
Mdirects the airflow through the rear-
compartment air ventsOdirects the airflow through the footwell
air ventsXTurn the key to position 2 in the ignition
lock.XPress the Z, M , ¯ , c , O ,
\ or P button.
Setting the airflow
XTurn the SmartKey to position 2 in the
ignition lock.XTo increase/reduce: press the K or
I button.
Vehicles with Voice Control System: when
voice control is started, the airflow is
restricted to 50%. After voice control is
finished, the airflow is adjusted back to the
previous setting.
Switching the MONO function on/off
Only multi-zone automatic climate control
features the "MONO" function. 19
You can use the MONO function to adopt the
settings configured for temperature, air
distribution and airflow on the driver's side for
the front-passenger side and the rear
compartment.
XPress the º button.
The indicator lamp in the º button lights
up or goes out.
Defrosting the windshield
You can use this function to defrost the
windshield or to defrost the inside of the
windshield and the side windows.
i You should only select the defrosting
function until the windshield is clear again.
XTurn the SmartKey to position 2 in the
ignition lock.XTo activate: press the ¦ button.
The indicator lamp in the ¦ button lights
up.
The climate control system switches to the
following functions:
R cooling with air dehumidification on
R high airflow 20
R high temperature 20
R air distribution to the windshield and
front side windows
R air-recirculation mode offXTo deactivate: press the ¦ button.
The indicator lamp in the ¦ button goes
out. The previously selected settings come
into effect again. The cooling with air18 Canada only.
19 Canada only.
20 Depending on the outside temperature.142Operating climate control systemsClimate control
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dehumidification function remains on. Air-
recirculation mode remains deactivated.
or
XPress the ^ button.
or
XPress the à button.
or
XTurn the temperature control clockwise or
counter-clockwise.
or
XPress the K or I button.
Defrosting the windows
Windows fogged up on the inside
XActivate the "cooling with air
dehumidification" function Á.XActivate automatic mode Ã.XIf the windows continue to fog up, activate
the defrosting function ( Y page 142).
i
You should only select this setting until
the windshield is clear again.
Windows fogged up on the outside
XSwitch on the windshield wipers.XPress the P/\ 21
or O /c 21
air distribution button.
i You should only select this setting until
the windshield is clear again.
Rear window heating
Activating/deactivating
GWarning
Any accumulation of snow and ice should be
removed from the rear window before driving.
Visibility could otherwise be impaired,
endangering you and others.
The rear window heating has a high current
draw. You should therefore switch it off as
soon as the window is clear as it only switches
off automatically after several minutes.
If the battery voltage is too low, the rear
window heating may switch off.XTurn the SmartKey to position 2 in the
ignition lock.XPress the ª button.
The indicator lamp in the ª button lights
up or goes out.
Problems with the rear window heating
If the indicator lamp in the ª rear window
heating button flashes, the on-board voltage
is too low or the roof is open. The rear window
heating has deactivated itself prematurely or
cannot be activated.
XSwitch off any consumers that are not
required, e.g. reading lamps or interior
lighting.
When the battery is sufficiently charged,
the rear window heating is activated again
automatically.
Activating/deactivating air-
recirculation mode
You can deactivate the flow of fresh air if
unpleasant odors are entering the vehicle
from outside. The air already inside the
vehicle will then be recirculated.
The operation of the air-recirculation mode is
the same for all control panels.
GWarning
Fogged windows impair visibility,
endangering you and others. If the windows
begin to fog on the inside, switching off the
air recirculation mode immediately should
clear interior window fogging. If interior
window fogging persists, make sure the air
conditioning is activated, or press the ¬
button.
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XTurn the SmartKey to position 2 in the
ignition lock.XTo activate: press the d button.
The indicator lamp in the d button lights
up.
i Air-recirculation mode is activated
automatically at high outside
temperatures. When air-recirculation mode
is activated automatically, the indicator
lamp in the d button is not lit.
Outside air is added after about 30
minutes.
XTo deactivate: press the d button.
The indicator lamp in the d button goes
out.
i Air-recirculation mode switches off
automatically:
R after approximately five minutes if
outside temperatures are under about
41 ‡ (5 †)
R after approximately five minutes if
cooling with air dehumidification is
deactivated
R after approximately 30 minutes if outside
temperatures are over about
41 ‡ (5 †)
i The air-recirculation mode does not
switch off automatically if outside
temperatures exceed 79 ‡ (26 †). After
about 30 minutes, outside air will be
added. 22
Switching the residual heat on/off
It is possible to make use of the residual heat
of the engine to continue heating the
stationary vehicle for up to 30 minutes after
the engine has been switched off. The heating
time depends on the temperature that has
been set.
i The blower will run at a low speed
regardless of the airflow setting.
i If you activate the "residual heat" function
at high temperatures, only the ventilation
will be activated. The blower runs at
medium speed.XTurn the SmartKey to position 0 in the
ignition lock or remove it.XTo switch on: press the Á button.
The indicator lamp in the Á button lights
up.XTo switch off: press the Á button.
The indicator lamp in the Á button goes
out.
i Residual heat is deactivated
automatically:
R after about 30 minutes
R when the ignition is switched on
R if the battery voltage drops
R if the coolant temperature is too low
Setting the air vents
Important safety guidelines
GWarning
When operating the climate control, the air
that enters the passenger compartment
through the air vents can be very hot or very
cold (depending on the set temperature). This
could cause burns or frostbite to unprotected
skin in the immediate area of the air vents.
Always keep sufficient distance between
unprotected parts of the body and the air
vents. If necessary, use the air distribution
adjustment to direct the air to air vents in the
vehicle interior that are not in the immediate
area of unprotected skin.
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In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes:
R keep the air inlet grille on the hood free of
blockages, such as ice, snow or leaves
R never cover the vents or air inlet and outlet
grilles in the vehicle interior.
i For virtually draft-free ventilation, adjust
the sliders of the air vents to the center
position.
Setting the center air vents
:Center air vent, left;Center air vent, right=Center vent thumbwheel, right?Center vent thumbwheel, leftXTo open/close: turn thumbwheels =
and ? up or down.
Setting the side air vents
XTo open/close: turn thumbwheel = up or
down.
i Side window defroster vent : is never
completely shut, even if side air vent ; is
shut.
Setting the rear-compartment air
vents
Setting the center vents in the rear
compartment
:Rear control panel 23;Rear-compartment air vent, right=Rear-compartment air vent, left
When the climate control panel is switched
on/off, the air supply through the rear-
compartment air vents is also switched on/
off.
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