2007-2013 Mercedes C Class 4 Door Climate control -> Operating the climate control systems User Manual
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Climate control -> Operating the climate control systems for Your Mercedes C Class 4 Door Second Generation (2007-2013)

Notes on using 3-zone automatic
climate control
Automatic climate control
The following contains instructions and
recommendations to enable you to getthe
most out of your automatic climate control.
R
Activate climate control using the à and
¿ buttons. The indicator lamps in the
à and ¿ buttons light up.
R
In automatic mode, you can also use the
ñ 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
compartmentas well.The indicator lamp in
the á 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 146).
i
The ECO start/stop function is not
available on AMG vehicles.
Operating the climate control
systems
Switching climate control on/off
Points to observe before use
When the climate control is switched off, the
air supply and air circulation are also
switched off. Only use this setting for a brief
period. The windows could otherwise fog up.
Only switch off climate control briefly to
prevent the windows from fogging up.
i
Switch on climate control primarily using
the à button (Y page 132).
Activating/deactivating
X
Turn the SmartKey to position 2 in the
ignition lock (Y page 141).
X
To activate: press the à button.
The indicator lamp in the à button 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 are
restored.
X
To deactivate: press the ^ button.
The indicator lamp in the ^ button lights
up.
Activating/deactivating cooling with
air dehumidification
Points to observe before use
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. Only deactivate the cooling
with air dehumidification function for a short
time to prevent the windows from fogging up.
The cooling with air dehumidification function
is only available when the engine is running.
The air inside the vehicle is cooled and
Operating the climate control systems
131
Climate control
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
malfunction.
Activating/deactivating
X
To activate: press the ¿ button.
The indicator lamp in the ¿ button lights
up.
i
When the "Cooling with air
dehumidification" function is activated,
one of the indicator lamps on the auxiliary
heating button will light up on vehicles with
auxiliary heating.
X
To deactivate: press the ¿ button.
The indicator lamp in the ¿ button goes
out. The "Cooling with air dehumidification"
function has a delayed switch-offfeature.
Problems with the "Cooling with air
dehumidification" function
When you press the ¿ button, the
indicator lamp in the button flashes three
times or remains off. You can no longer switch
on the cooling with air dehumidification
function.
X
Visit a qualified specialist workshop.
Setting climate control to automatic
In automatic mode, the set temperature is
maintained automatically at a constantlevel.
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 switch off the cooling function, the
vehicle will not be cooled when weather
conditions are warm. The windows can fog up
more quickly. Only deactivate the cooling
with air dehumidification function for a short
time to preventthe windows from fogging up.
X
Turn the SmartKey to position 2 in the
ignition lock (Y page 141).
X
Set the desired temperature.
X
To activate: press the à button.
The indicator lamp in the à button 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 132).
X
To selectmanually: press the _
button.
or
X
Press the K or I button.
The indicator lamp in the à button goes
out. Automatic airdistribution 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 2 in the
ignition lock (Y page 141).
X
Press the à button.
X
Press the ñ button repeatedly until the
required airflow setting appears in the
display.
132
Operating the climate control systems
Climate control
Setting the temperature
Dual-zone automatic climate control
Different temperatures can be set for the
driver's and front-passenger sides.
X
Turn the SmartKey to position 2 in the
ignition lock (Y page 141).
X
To increase/reduce: turn control : or
B clockwise or counter-clockwise
(Y page 127).
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †).
3-zone automatic climate control
7
Automatic climate control zones
You can select different temperature settings
for the driver's and front-passenger sides as
well as for the rear compartment.
X
Turn the SmartKey to position 2 in the
ignition lock (Y page 141).
X
To increase/reduce the temperature in
the front: turn control : or B clockwise
or counter-clockwise (Y page 130).
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †).
X
To increase/reduce the temperature in
the rear compartment using the front
control panel: press the á button.
The indicator lamp in the á button goes
out.
X
Turn control : clockwise or counter-
clockwise (Y page 130).
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †).
X
To increase/reduce the temperature in
the rear compartment using the rear
control panel: press the 9 or :
button on the rear control panel.
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †).
i
If you leave the vehicle parked for longer
than 30 minutes, the temperature setting
for the rear compartment then switches
back to 72 ‡ (22 †).
Setting the air distribution
Air distribution settings
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
8
a
Directs air through the defroster and
footwell vents
_
Directs air through the defroster,
center, side and footwell vents
8
i
Regardless of the air distribution setting,
airflow is always directed through the side
air vents. The side air vents can only be
closed when the controls on the side air
vents are turned downwards.
7
Canada only.
8
Canada only.
Operating the climate control systems
133
Climate control
Adjusting
X
Turn the SmartKey to position 2 in the
ignition lock(Ypage 141).
X
Press the _ button repeatedly until the
desired symbol appears in the display.
The indicator lamp in the à button 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 2 in the
ignition lock (Y page 141).
X
To increase/reduce: press the K or
I 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 the á button.
The indicator lamp in the á button 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 activated, the temperature
setting for the driver's side is not adopted for
the other climate control zones.
X
To deactivate: press the á button.
The indicator lamp in the á button 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 select the "windshield
defrosting" function until the windshield is
clear again.
X
Turn the SmartKey to position 2 in the
ignition lock (Y page 141).
X
To activate: press the ¬ button.
The indicator lamp in the ¬ button lights
up.
The climate control system switches to the
following functions:
R
high airflow
R
high temperature
R
air distribution to the windshield and
frontside 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 the ¬ button.
The indicator lamp in the ¬ button goes
out. The previously selected settings are
restored. Air-recirculation mode remains
deactivated.
or
134
Operating the climate control systems
Climate control
X
Press the à button.
The indicator lamp in the ¬ button goes
out. Airflow and air distribution are set to
automatic mode.
or
X
Turn temperature control : or B
clockwise or counter-clockwise
(Y page 127), (Y page 130).
or
X
Press the K or I 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 the Ù button.
The indicator lamp in the button lights up.
X
To activate: press the Ù button again.
The indicator lamp goes out. The previously
selected settings are restored.
Defrosting the windows
Windows fogged up on the inside
X
Activate the ¿ cooling with air
dehumidification function.
X
Activate automatic mode Ã.
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 "windshield defrosting" function
(Y page 134).
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 _ button repeatedly until the
O or P symbol appears in the
display.
X
Adjust the side air ventsso that no air is
directed to the side windows.
Rear window defroster
Activating/deactivating
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.
X
Turn the SmartKey to position 2 in the
ignition lock (Y page 141).
X
Press the ¤ button.
The indicator lamp in the ¤ button lights
up or goes out.
Operating the climate control systems
135
Climate control
Problems with the rear window defroster
Problem Possible causes/consequences and M Solutions
The rear window
defroster has
deactivated
prematurely or cannot
be activated.
The battery has not been sufficiently charged.
X
Switch 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.
Activating/deactivating air-
recirculation mode
If you switch on air-recirculation mode, the
windows can fog up more quickly, in
particular at low temperatures. Only use air-
recirculation mode briefly to prevent the
windows from fogging up.
You can deactivate the flow of fresh air if
unpleasant odors are enteringthe vehicle
from outside. The air already inside the
vehicle will then be recirculated.
The operation of air-recirculation mode is the
same for all control panels.
X
Turn the SmartKey to position 2 in the
ignition lock (Y page 141).
X
To activate: press the g button.
The indicator lamp in the g button lights
up.
i
In the event of high pollution levels
9
or at
high outside temperatures, air-
recirculation mode is automatically
activated. When air-recirculation mode is
activated automatically, the indicator lamp
in the g button is not lit.
Outside air is added after about
30 minutes.
X
To deactivate: press the g button.
The indicator lamp in the g button goes
out.
i Air-recirculation mode deactivates
automatically:
R
after approximately five minutes at
outside temperatures below
approximately 41 ‡ (5 †)
R
after approximately five minutes if
cooling with air dehumidification is
deactivated
R
after approximately 30 minutes at
outside temperatures above
approximately 41 ‡(5 †) if the "Cooling
with air dehumidification" function is
activated
Activating/deactivating the residual
heat function
The residual heat function is only available in
vehicles for Canada with 3-zone automatic
climate control.
It is possible to make use of the residual heat
of the engine to continue heating the vehicle
for approximately 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.
9
3-zone automatic climate control only.
136
Operating the climate control systems
Climate control

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Useful information Overview of climate control systems Setting the air vents

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