2014 MERCEDES-BENZ C-Class SEDAN window

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 Read the information on qualified
specialist workshops: (Y page 25).Overview of climate control systems
Important safety notes
Observe the settings recommended on the
following pages. The windows could
otherwise fog up.
To preven tthe 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
dehumidification function
R switch 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.
The residual heat function can only be
activated or deactivated with the ignition
switched off (Y page 141).
i Ventilate the vehicle for a brief period
during warm weather, e.g. using the
convenience opening feature (Y page 89).
This will speed up the cooling process and
the desired vehicle interior temperature
will be reached more quickly. i
The integrated filter filters out most
particles of dust and soot and completely
filters out pollen. It also reduces gaseous
pollutants and odors. Aclogged filter
reduces the amoun tofair 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.
i It is possible that the dehumidification
function 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. 130
Overview of climate control systemsClimate control

Control panel for dual-zone automatic climate control
Canada only
0002
To set the temperature, left (Y page 138)
0003 To defros tthe windshield (Y page 139)
0022 To switch the ZONE function on/off (Y page 139)
0021 To switch cooling with air dehumidification on/off (Y page 135)
001F To switch the rear window defroster on/off (Y page 140)
0020 To set the temperature, right (Y page 138)
0012 To activate/deactivate air-recirculation mode (Y page 141)
0013 To set the air distribution (Y page 138)
0014 To increase the airflow (Y page 139)
0015 To reduce the airflow (Y page 139)
0016 To switch climate control on/off (Y page 135)
0018 To set climate control to automatic (Y page 137) Overview of climate control systems
131Climate control

USA only
0002
To set the temperature, left (Y page 138)
0003 To defrost the windshield (Y page 139)
0022 To switch maximum cooling on/off (Y page 140)
0021 To switch cooling with air dehumidification on/off (Y page 135)
001F To switch the rear window defroster on/off (Y page 140)
0020 To set the temperature, right (Y page 138)
0012 To activate/deactivate air-recirculation mode (Y page 141)
0013 To set the air distribution (Y page 138)
0014 To increase the airflow (Y page 139)
0015 To reduce the airflow (Y page 139)
0016 To switch climate control on/off (Y page 135)
0018 To set climate control to automatic (Y page 137)Notes on using climate control
Automatic climate control The following contains notes and
recommendations on optimum use of dual-
zone automatic climate control.
R
Activate climate control using the 0004and
0005 buttons. The indicator lamps in the
0004 and0005 buttons light up.
R Set the temperature to 72 ‡ (22 †).
R Only use the "windshield 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, since no fresh air is drawn
into the vehicle in air-recirculation mode.
R Use the ZONE function to adopt the
temperature settings on the driver's side
for the front-passenger side as well.T he
indicator lamp in the 0003button goes out.
ECO start/stop function During automatic engine switch-off, the ECO
start/stop function only operates at a
reduced capacity. If you require the full132
Overview of climate control systemsClimate control

Control panel for 3-zone automatic climate control
Canada only
Fron tcontrol panel
0002 To set the temperature, left (Y page 138)
0003 To defrost the windshield (Y page 139)
0022 To switch the residual heat function on/off (Y page 141)
0021 To switch cooling with air dehumidificatio non/off (Y page 135)
001F To switch the rea rwindow defroster on/off (Y page 140)
0020 To set the temperature, right (Y page 138)
0012 To switch the ZONE function on/off (Y page 139)
0013 To switch climate control on/off (Y page 135)
0014 To set the air distribution (Y page 138)
0015 To increase the airflow (Y page 139)
0016 To reduce the airflow (Y page 139)
0018 To adjust airflow (Y page 137)
0019 To activate/deactivate air-recirculation mode (Y page 141)
001A To set climate control to automatic (Y page 137)
Rear control panel
001B To increase the airflow (Y page 139)
001D To reduce the airflow (Y page 139)
001E Display
0023 To reduce the temperature (Y page 138)
0024 To increase the temperature (Y page 138)134
Overview of climate control systemsClimate control

Notes on using 3-zone automatic
climate control
Automatic climate control The following contains instructions and
recommendations to enable you to ge tthe
most out of your automatic climate control.
R Activate climate control using the 0004and
0005 buttons. The indicator lamps in the
0004 and0005 buttons light up.
R In automatic mode, you can also use the
000A button to adjust airflow (FOCUS/
MEDIUM/DIFFUSE). The MEDIUM level is
recommended.
R Set the temperature to 72 ‡ (22 †).
R Only use the "windshield 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, since no fresh air is drawn
into the vehicle in air-recirculation mode.
R Use the ZONE function to adopt the
temperature settings on the driver's side
for the front-passenger side and the rear
compartmenta s well.The indicator lamp in
the 0003 button 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 deactivated with the ignition switched
off.
ECO start/stop function During automatic engine switch-off, the ECO
start/stop function only operates at a
reduced capacity. If you require the full
climate control output, you can switch off the
ECO start/stop function by pressing the ECO
button (Y page 152).
i The ECO start/stop function is not
available on AMG vehicles. Operating the climate control
systems
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 only
briefly
i
Switch on climate control primarily using
the 0004 button (Y page 137).
Activating/deactivating X
Turn the SmartKey to position 2in the
ignition lock (Y page 147).
X To activate: press the0004button.
The indicator lamp in the 0004button lights
up. Airflow and air distribution are set to
automatic mode.
or
X Press the 000Cbutton.
The indicator lamp in the 000Cbutton goes
out. The previously selected settings are
restored.
X To deactivate: press the000Cbutton.
The indicator lamp in the 000Cbutton lights
up. Activating/deactivating cooling with
air dehumidification
General notes If you deactivate the "Cooling with air-
dehumidification" 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 cooledOperating the climate control systems
135Climate control

Problems with the "Cooling with air dehumidification" function
Problem Possible causes/consequences and
0001 Solutions
The indicator lamp in
the
0005 button
flashes three times or
remains off. The
"Cooling with air
dehumidification"
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 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.
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-
dehumidification" 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.
Activating/switching X
Turn the SmartKey to position 2in the
ignition lock (Y page 147).
X Set the desired temperature.
X To activate: press the0004button.
The indicator lamp in the 0004button lights
up. Automatic air distribution and airflow
are activated.
3-zone automatic climate control: when
automatic mode is activated, you can adjust
airflow (Y page 137). X
To selectm anually:press the 0015
button.
or
X Press the 0017or0016 button.
The indicator lamp in the 0004button goes
out. Automatic aird istribution and airflow
are deactivated. Adjusting airflow
This function is only available with 3-zone
automatic climate control.
In automatic mode you can select the
following 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 draft
X Turn the SmartKey to position 2in the
ignition lock (Y page 147).
X Press the 0004button.
X Press the 000Abutton repeatedly until the
required airflow setting appears in the
display. Operating the climate control systems
137Climate control

Adjusting
X
Turn the SmartKey to position 2in the
ignition loc k(Ypage 147).
X Press the 0015button repeatedly until the
desired symbol appears in the display.
The indicator lamp in the 0004button goes
out. Automatic control is deactivated and
the air distribution is controlled according
to the selected setting. Setting the airflow
X Turn the SmartKey to position 2in the
ignition lock (Y page 147).
X To increase/reduce: press the0017or
0016 button.
i You can use 3-zone automatic climate
control to set the airflow in the rear
compartment separately.
If the battery is not sufficiently charged,
blower output may be reduced. As soon as
the battery is sufficiently charged, full blower
output will be available. Switching the ZONE function on/off
This function is only available in vehicles for
Canada.
X To activate: press the0003button.
The indicator lamp in the 0003button lights
up.
Dual-zone automatic climate control: the
temperature setting for the driver's side is
not adopted for the front-passenger side.
3-zone automatic climate control: the
temperature setting for the driver's side is
not adopted for the front-passenger side
and the rear compartment.
When the buttons for temperature, airflow or
air distribution are pressed, the temperature
setting on the driver' sside is not adopted for
the other climate control zones. X
To deactivate: press the0003button.
The indicator lamp in the 0003button goes
out.
Dual-zone automatic climate control: the
temperature setting for the driver's side is
adopted for the front-passenger side.
3-zone automatic climate control: the
temperature setting for the driver's side is
adopted for the front-passenger side and
the rear compartment. 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 selec tthe "windshield
defrosting" function until the windshield is
clear again.
X Turn the SmartKey to position 2in the
ignition lock (Y page 147).
X To activate: press the0007button.
The indicator lamp in the 0007button lights
up.
The climate control system switches to the
following functions:
R high airflow
R high temperature
R air distribution to the windshield and
front side windows
R air-recirculation mode off
If the battery is not sufficiently charged,
blower output may be reduced. As soon as
the battery is sufficiently charged, full blower
output will be available.
X To deactivate: press the0007button.
The indicator lamp in the 0007button goes
out. The previously selected settings are
restored. Air-recirculation mode remains
deactivated.
or Operating the climate control systems
139Climate control

X
Press the 0004button.
The indicator lamp in the 0007button goes
out. Airflow and air distribution are set to
automatic mode.
or
X Turn temperature control 0002or0020
clockwise or counter-clockwise
(Y page 131), (Y page 134).
or
X Press the 0017or0016 button. MAX COOL maximum cooling
The MAX COOL function is only available in
vehicles for the USA.
MAX COOL is only operational when the
engine is running.
When you activate MAX COOL, climate
control switches to the following functions:
R maximum cooling
R maximum airflow
R air-recirculation mode on
X To activate: press the0001button.
The indicator lamp in the button lights up.
X To activate: press the0001button again.
The indicator lamp goes out. The previously
selected settings are restored. Defrosting the windows
Windows fogged up on the inside X
Activate the 0005cooling with air
dehumidification function.
X Activate automatic mode 0004.
X Adjust the side air vents so that the warmed
air is directed to the side windows.
X If the windows continue to fog up, activate
the 0007 "Windshield defrosting" function.
i You should only select this setting until
the windshield is clear again. Windows fogged up on the outside X
Activate the windshield wipers.
X Press the 0015button repeatedly until the
0018 or0019 symbol appears in the
display.
X Adjust the side air ventss o that no air is
directed to the side windows. 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
X
Turn the SmartKey to position 2in the
ignition lock (Y page 147).
X Press the 000Bbutton.
The indicator lamp in the 000Bbutton lights
up or goes out. 140
Operating the climate control systemsClimate control