2012 MERCEDES-BENZ R-Class Owner's Manual

XFor safety reasons, you should remove the
SmartKey from the ignition lock.
or
XSwitch off the engine using the Start/Stop
button and open the driver's door.XRemove the cause of the obstruction.XSwitch the windshield wipers back on.
The windshield wipers are inoperative
The windshield wiper drive is malfunctioning.
XSelect another wiper speed on the
combination switch.XHave the windshield wipers checked at a
qualified specialist workshop.
The spray nozzles are misaligned
The windshield washer fluid from the spray
nozzles no longer hits the center of the
windshield. The spray nozzles are misaligned.
XHave the spray nozzles adjusted at a
qualified specialist workshop.Windshield wipers127Lights and windshield wipersZ

128

Useful information ............................130
Overview of climate control sys-
tems ................................................... 130
Operating the climate control sys-
tem ..................................................... 134
Setting the air vents .........................141129Climate control

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Please read the information on qualified
specialist workshops ( Y page 24).
Overview of climate control systems
Important safety notes
GWARNING
Severe conditions (e.g. strong air pollution)
may require replacement of the filter before
its scheduled replacement interval. A clogged
filter will reduce the air volume to the interior
and the windows could fog up, impairing
visibility and endangering you and others.
Have a blocked filter replaced at a Mercedes-
Benz Center as soon as possible.
GWARNING
Follow the recommended settings for heating
and cooling given on the following pages.
Otherwise, the windows could fog up,
impairing visibility and endangering you and
others.
The automatic climate control 13
adjusts the
temperature and the humidity of the vehicle
interior and filters undesired substances from
the air.
The automatic climate control 13
is only
operational when the engine is running. 14
Optimum operation is only achieved if you
drive with the side windows and sliding
sunroof/panorama roof with power tilt/
sliding panel closed.
i Ventilate the vehicle for a brief period
during warm weather, e.g. using the
convenience opening feature ( Y page 87).
This will speed up the cooling process and
the desired vehicle interior temperature
will be reached more quickly.
i The integrated filter can filter out most
particles of dust and completely filters out
pollen. A clogged filter reduces the amount
of air supplied to the vehicle interior. For
this reason, you should always observe the
interval for replacing the filter, which is
specified in the Service Booklet. As it
depends on environmental conditions, e.g.
heavy air pollution, the interval may be
shorter than stated in the Service Booklet.13 Canada only.
14 Automatic climate control: the residual heat function can only be activated/deactivated when the ignition
is switched off.130Overview of climate control systemsClimate control

Control panel for dual-zone automatic climate control:To set the temperature, left (Y page 137);To set climate control to automatic ( Y page 136)=To defrost the windshield ( Y page 138)?To increase the airflow ( Y page 138)ATo direct the airflow through the defroster vents ( Y page 138)BTo activate/deactivate cooling with air dehumidification ( Y page 135)CTo set the temperature, right ( Y page 137)DTo switch rear-compartment climate control on/off ( Y page 134)ETo direct the airflow through the center and side air vents ( Y page 138)FTo direct the airflow to the footwells and side air vents ( Y page 138)GTo display the airflow levelHTo reduce the airflow ( Y page 138)ITo switch the rear window defroster on/off ( Y page 139)JTo activate/deactivate air-recirculation mode ( Y page 140)KInterior temperature sensorLTo switch climate control on/off ( Y page 134)Notes on using dual-zone automatic
climate control
The following contains notes and
recommendations on optimum use of dual-
zone automatic climate control.
R Activate climate control using the à and
Á buttons. The indicator lamps in the
à and Á buttons light up.
R Set the temperature to 72 ‡ (22 †).
R Only use the "defrosting" function briefly
until the windshield is clear again.
R Only use "air-recirculation" mode briefly,
e.g. if there are unpleasant outside odorsor when in a tunnel. The windows could
otherwise fog up as, in air-recirculation
mode, no fresh air is drawn into the vehicle.
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 deactivated with the ignition
switched off.Overview of climate control systems131Climate controlZ

Control panel for 3-zone automatic climate control
Canada only
Front control panel:To set the temperature, left (Y page 137);To set climate control to automatic ( Y page 136)=To direct the airflow through the defroster vents, left ( Y page 138)?To defrost the windshield ( Y page 138)ATo increase the airflow ( Y page 138)BTo switch the rear window defroster on/off ( Y page 139)CTo direct the airflow through the defroster vents, right ( Y page 138)DTo operate the rear-compartment climate control via the front control panel
( Y page 134)ETo set the temperature, right ( Y page 137)FTo switch climate control on/off ( Y page 134)GTo direct the airflow to the footwells and side air vents, right ( Y page 138)HTo direct the airflow through the center and side air vents, right ( Y page 138)ITo activate/deactivate cooling with air dehumidification ( Y page 135)To activate/deactivate the residual heat function ( Y page 140)JDisplayKTo reduce the airflow ( Y page 138)LTo activate/deactivate air-recirculation mode ( Y page 140)MTo direct the airflow through the center and side air vents, left ( Y page 138)NTo direct the airflow to the footwells and side air vents, left ( Y page 138)OInterior temperature sensor132Overview of climate control systemsClimate control

PTo switch the MONO function on/off (Y page 138) Rear control panelQTo increase the airflow ( Y page 138)RTo set the temperature ( Y page 137)STo set the rear-compartment climate control to automatic ( Y page 136)TTo direct the airflow through the rear air vents ( Y page 138)UTo direct the airflow through the footwell vents( Y page 138)VTo switch rear-compartment climate control on/off ( Y page 134)WTo reduce the airflow ( Y page 138)
USA only
Front control panel:To set the temperature, left ( Y page 137);To set climate control to automatic ( Y page 136)=To defrost the windshield ( Y page 138)?To increase the airflow ( Y page 138)ATo direct the airflow through the defroster vents ( Y page 138)BTo activate/deactivate cooling with air dehumidification ( Y page 135)To activate/deactivate the residual heat function ( Y page 140)CTo set the temperature, right ( Y page 137)DTo switch rear-compartment climate control on/off ( Y page 134)ETo direct the airflow through the center and side air vents ( Y page 138)FTo direct the airflow to the footwells and side air vents ( Y page 138)GTo display the airflow levelOverview of climate control systems133Climate controlZ

HTo reduce the airflow (Y page 138)ITo switch the rear window defroster on/off ( Y page 139)JTo activate/deactivate air-recirculation mode ( Y page 140)KInterior temperature sensorLTo switch climate control on/off ( Y page 134) Rear control panelMTo increase the airflow ( Y page 138)NTo set the temperature ( Y page 137)OTo set the rear-compartment climate control to automatic ( Y page 136)PTo direct the airflow through the rear air vents ( Y page 138)QTo direct the airflow through the footwell vents ( Y page 138)RTo switch rear-compartment climate control on/off ( Y page 134)STo reduce the airflow ( Y page 138)Notes on using 3-zone automatic
climate control
The following contains instructions and
recommendations to enable you to get the
most out of your automatic climate control.
R Activate climate control using the à and
Á buttons. The indicator lamps in the
à and Á buttons light up.
R Set the temperature to 72 ‡ (22 †).
R Only use the "defrosting" function briefly
until the windshield is clear again.
R Only use "air-recirculation" mode briefly,
e.g. if there are unpleasant outside odors
or when in a tunnel. The windows could
otherwise fog up as, in air-recirculation
mode, no fresh air is drawn into the vehicle.
R Use the MONO function if you want to
adopt the temperature and air distribution
settings from the driver's side for all
climate zones. The indicator lamp in the
º button lights up.
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 deactivated with the ignition
switched off.Operating the climate control system
Activating/deactivating climate
control
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 Switch on climate control primarily using
the à button ( Y page 136).
134Operating the climate control systemClimate control