2015 MERCEDES-BENZ B-CLASS SPORTS Owners Manual

Useful information............................120
Overview of climate control sys-
tems ................................................... 120
Operating the climate control sys-
tems ................................................... 124
Air vents ............................................ 131
119
Climate control

Useful information
iThis Operator's Manual describes all
models and all standard and optional equip- ment 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.
iRead the information on qualified special-
ist workshops ( Ypage 24).
Overview of climate control systems
General notes
Observe the settings recommended on the
following pages. The windows could other-
wise fog up.
To prevent the windows from fogging 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 defrost windshield function
briefly, if required
The air-conditioning system/dual-zone auto-
matic climate control regulates the tempera- ture and the humidity of the vehicle interior
and filters out undesirable substances from
the air.
The air-conditioning system/dual-zone auto-
matic climate control can only be operated
when the engine is running. Optimum opera-
tion is only achieved with the side windows
and panorama roof with power tilt/sliding
panel closed.
The residual heat function can only be acti-
vated or deactivated with the ignition
switched off ( Ypage 130).
Always keep the ventilation flaps behind the
side paneling in the cargo compartment clear. Otherwise the vehicle will not be ventilated
correctly.
iVentilate the vehicle for a brief period
during warm weather, e.g. using the con-
venience opening feature ( Ypage 82). This
will speed up the cooling process and the
desired interior temperature will be
reached more quickly.
iThe integrated filter filters out most par-
ticles of dust and soot and completely fil-
ters out pollen. It also reduces gaseous pol- lutants and odors. 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 Maintenance
Booklet. As it depends on environmental
conditions, e.g. heavy air pollution, the
interval may be shorter than stated in the
Maintenance Booklet.
iIt is possible that under certain circum-
stances the residual heat function may be
activated automatically an hour after the
SmartKey has been removed in order to dry the automatic climate control. The vehicle
is then ventilated for 30 minutes.
120Overview of climate control systems
Climate control

Air-conditioning system control panel
:Sets the temperature (Ypage 126)
;Defrosts the windshield ( Ypage 128)
=Sets the air distribution ( Ypage 127)
?Activates/deactivates air-recirculation mode ( Ypage 130)
ASets the airflow ( Ypage 127)
BSwitches cooling with air dehumidification on/off ( Ypage 124)
CSwitches the rear window defroster on/off ( Ypage 129)
Notes on using the air-conditioning
system
Air-conditioning system
Below, you can find a number of notes and
recommendations to help you use the air-
conditioning system optimally.
R Switch on the air-conditioning system by
turning control knob Aclockwise to the
desired position (except position 0).
R Set the temperature to 22 †.
R Recommendation for avoiding misted
windows at low exterior temperatures
or in rain: switch on the ¿cooling with
dehumidification function ( Ypage 124).
Set air distribution to ¯and if possible
switch off PandO (Y page 127).
Deactivate air-recirculation mode e
( Y page 130). Set airflow control
Ato a setting between
3 and 6(Y page 127).
R Recommendation for rapid cooling or
heating of the vehicle interior: briefly set
airflow control Ato a setting between 3
and 6(Y page 127).
R Recommendation for a constant vehi-
cle interior temperature: set airflow con-
trol Ato a setting between 1and 3
( Y page 127).
R Recommendation for air distribution in
winter: select the Oand¯ settings
( Y page 127).
Recommendation for air distribution in
summer: select the PorP and
¯ settings ( Ypage 127).
R Only use the "Windshield defrosting" func-
tion briefly until the windshield is clear
again.
Overview of climate control systems121
Climate cont rol

ROnly use air-recirculation mode briefly, e.g.
if there are unpleasant outside odors or
when in a tunnel. The windows could oth-
erwise fog up, since no fresh air is drawn
into the vehicle in air-recirculation mode.
R If you change the settings of the climate
control system, the climate status display
appears for approximately three seconds
at the bottom of the screen in the Audio/
COMAND display (see separate 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 system only operates at a
reduced capacity. If you require the full cli-
mate control output, you can switch off the
ECO start/stop function by pressing the ECO
button ( Ypage 140).
122Overview of climate control systems
Climate control

Control panel for dual-zone automatic climate control
:Sets the temperature, left (Ypage 126)
;Sets climate control to automatic ( Ypage 126)
=Defrosts the windshield ( Ypage 128)
?Increases the airflow ( Ypage 127)
ASets the air distribution ( Ypage 127)
BDisplay
CActivates/deactivates air-recirculation mode ( Ypage 130)
DSwitches climate control on/off ( Ypage 124)
ESets the temperature, right ( Ypage 126)
FSwitches the residual heat function on/off ( Ypage 130)
GSwitches cooling with air dehumidification on/off ( Ypage 124)
HReduces the airflow ( Ypage 127)
ISwitches the rear window defroster on/off ( Ypage 129)
JSwitches the ZONE function on/off ( Ypage 127)
Optimum use of dual-zone climate
control
Climate control system
The following contains instructions and rec-
ommendations to enable you to get the most
out of your dual-zone automatic climate con- trol.
R Activate climate control using the Ãand
¿ buttons. The indicator lamps in the
à and¿ buttons light up.
R Set the temperature to 22 †. R
Only use the "Windshield defrosting" func-
tion 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 oth-
erwise fog up, since 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.
Overview of climate control systems123
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 deac- tivated with the ignition switched off.
R If you change the settings of the climate
control system, the climate status display
appears for approximately three seconds
at the bottom of the screen in the Audio/
COMAND display (see separate 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 system only operates at a
reduced capacity. If you require the full cli-
mate control output, you can switch off the
ECO start/stop function by pressing the ECO
button ( Ypage 140).
Operating the climate control sys- tems
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 fog up.
Therefore, switch off climate control onlybriefly
Air-conditioning system
X Turn the SmartKey to position 2in the igni-
tion lock ( Ypage 135).
X To switch on: turn controlAclockwise to
the desired position (except position 0)
( Y page 121).
X To switch off: turn controlAcounter-
clockwise to position 0(Y page 121).
Dual-zone automatic climate control
X
Turn the SmartKey to position 2in the igni-
tion lock ( Ypage 135).
X To activate: 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 previously selected settings arerestored.
X To deactivate: press the^button.
The indicator lamp in the ^button lights
up.
iDual-zone automatic climate control:
switch on climate control primarily using the à button.
Activating/deactivating cooling with
air dehumidification
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 fog up more quickly. Therefore, only
deactivate the "Cooling with air-dehumidifi-
cation" function briefly.
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 temperatureselected.
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.
124Operating the climate control systems
Climate control

Switching on/off
XTo activate: 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 systems125
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 "Cool-
ing with air dehumidifi-
cation" function 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
General notes
The automatic function is only available in
conjunction with dual-zone automatic climate
control.
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 necessary, 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 fog up more quickly. Therefore, only deactivate the "Cooling with air-dehumidifi-
cation" function briefly.
Setting climate control to automatic
X Turn the SmartKey to position 2in the igni-
tion lock ( Ypage 135).
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
É orË button.
or X Press the KorI button.
The indicator lamp in the Ãbutton goes
out. Automatic air distribution and airflow
are deactivated.
Setting the temperature
Air-conditioning system
You can set the temperature for the entire
vehicle. The set temperature is automatically maintained at a constant level.
X Turn the SmartKey to position 2in the igni-
tion lock ( Ypage 135).
X To increase/reduce: turn control:
clockwise or counter-clockwise( Y page 121). Only change the temperature
setting in small increments. Start at 22 †.
Dual-zone automatic climate control
Different temperatures can be set for the
driver's and front-passenger sides. The set
temperature is automatically maintained at a
constant level.
X Turn the SmartKey to position 2in the igni-
tion lock ( Ypage 135).
X To increase/reduce: turn thumbwheel:
or E to the left or right ( Ypage 123). Only
126Operating the climate control systems
Climate control