Page 168 of 424
165 Automatic climate control
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index 1Center air outlet, left, adjustable
2Fixed air outlet, left
3Air volume control for left center air outlet
To open: Turn the thumbwheel upward.
■: The left center air outlet is fully open.
■■: The left center and fixed air outlets are
opened.
4Air temperature control for center air outlets
To lower temperature: Turn thumbwheel towards
the blue marking.
Automatic mode: Turn thumbwheel to positionA.
The indicator lamp above the thumbwheel will
illuminate. The airflow and temperature for the
center air outlets are regulated automatically.
5Air volume control for right center air outlet.
To open: Turn the thumbwheel upward
■: The right center air outlet is fully open.
■■: The right center and fixed air outlets are
opened.6Center air outlet, right, adjustable
7Fixed air outlet, right
8Side defroster outlet, left and right, fixed
9Side air outlet, left and right, adjustable
10Air volume control for side air outlets
To open: Turn thumbwheel outwards
■: The side air outlet is fully opened.
■■: The side and door air outlets are opened.
11Door air outlet, left and right
12Display and controls
Note:
We recommend that the sliders for the air
outlets (1, 6, 9) be clicked to the automatic position to
provide practically draft free ventilation.
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Page 169 of 424
166 Automatic climate control
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Display and controls
1Defrosting
2Rear window defroster, see page 176
3Residual engine heat utilization, see page 174
4Automatic climate control on/off
5Air distribution, right (automatic, manual operation)
6Economy mode, see page 173
7Temperature control, right8Air volume (automatic, manual)
9Display
Depending on the ambient light conditions, the
figures on the display will be shown as dark figures
on a bright background (in daylight), or as bright
figures on a dark background (at night).
10Temperature control, left
11Air recirculation, see page 171
12Air distribution, left (automatic, manual operation)
13Activated charcoal filter
Important!
This vehicle is equipped with an air conditioning
system that uses R-134a (HFC: hydrofluorocarbon) as a
refrigerant. Repairs should always be performed by a
qualified technician, and refrigerant should be collected
in a recovery system for recycling.
1
2
3
5
4
6
7
10
11
13
12
89
P83.40-2116-26
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Page 170 of 424
167 Automatic climate control
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Automatic climate control
The system is always at operational readiness, except
when manually switched off.
The automatic climate control only operates with the
engine running.
The temperature selector should be left at the desired
temperature setting. The temperature selected is
reached as quickly as possible.
Th e system w il l not hea t or c ool a ny q uicker by setting a
higher or lower temperature.
The desired interior temperature and air distribution
can be selected separately for the left and right side of
the passenger compartment.
The automatic climate control removes considerable
moisture from the air during operation in the cooling
mode. It is normal for water to drip on the ground
through ducts in the underbody.
The air conditioning will not engage (no cooling) if the
economy modeS is selected, see page 173. Notes:
Do not obstruct the air flow by placing objects on the air
flow-through exhaust slots below the rear window.
Also keep the air intake grill in front of the windshield
free of snow and debris.
The storage compartment between the front seats can be
ventilated. See page 175 for notes on ventilating the
storage space under the armrest in the center console.
The air conditioner switches itself off for its own
protection if refrigerant is lost. No cooling will then take
place. Economy modeS cannot be switched off. Have
the air conditioner checked by a Mercedes-Benz Center
should this happen.
Dust filter
Nearly all dust particles and pollen are filtered out
before outside air enters the passenger compartment
through the air distribution system.
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Page 171 of 424
168 Automatic climate control
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Basic setting – automatic mode
There are three basic settings for the automatic mode:
•Automatic air volume control
•Automatic air outlet control, left and right
•Automatic air outlet control, center, see page 165
We recommend these settings to be used all year round.Air volume and distribution are controlled
automatically.
Set the temperature switches on the left and right to
72°F (22°C). This provides for comfortable conditions in
the vehicle.
Automatic airf low regulation:
Press the A on the air volume switch. The display
shows “AUTO”.
Automatic air distribution:
Press on both Uknobs until they click in. Theh,
jand ksymbols will no longer be visible.
The economy mode and air recirculation functions will
be switched off. The automatic blower will be activated
at the same time.
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Page 172 of 424
169 Automatic climate control
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Special settings
(use only for short duration)
Air distribution, manual:
Press Ubutton. The button pops out, theh, j
andk symbols are visible. Turn the button to select
the air distribution desired.
hAir from the center, side and door air outlets.
jAir from the center, side, door and windshield air
outlets.
kAir from the center, side, door and footwell air
outlets.
To return to automatic mode:
Press the Ubutton until it clicks in. Theh, j
and ksymbols will no longer be visible.Air volume, manual
Press the air volume switch up or down. Seven blower
speeds can be selected.
P83.40-2257-21
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Page 173 of 424
170 Automatic climate control
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Defrosting
Press the Pbutton. The display showsP.
The fan is set to a higher speed and the warm air is
directed to the defroster and windshield air outlets.
Pressing the switch again returns the system to the
previous setting.Windows fogged on the inside
Switch off the economy mode, if selected: Press
buttonS. The indicator lamp in the button will go
out.
Switch off air recirculation, if selected: Press
buttonO. The indicator lamp in the button will go
out.
Adjust left and right air outlets upwards.
Set blower to the maximum blower speed.
Increase temperature setting.
Open the side air outlets and direct them onto the side
windows.
P83.40-2009-21
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Page 174 of 424
171 Automatic climate control
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Windshield fogged on the outside
Switch on the windshield wiper.
Press on both U buttons until they click in.
Theh, jand ksymbols will no longer be
visible.
Air recirculation
Select air recirculation:
The indicator lamp in the Obutton is off.
Press buttonO briefly. The indicator lamp in the
button illuminates.
To switch off the air recirculation:
The indicator lamp in the Obutton is on.
Press buttonO briefly. The indicator lamp in the
button will go out. The system automatically switches from air
recirculation to fresh air:
•after 30 minutes if the outside temperature is above
about 40°F(5°C),
•after 5 minutes if the outside temperature is below
about 40°F(5°C),
•after 5 minutes if economy modeS is selected.
The system switches automatically to air recirculation at
high outside temperatures. A quantity of outside air is
added after about 30 minutes.
Important!
If the windows should fog up from the inside, switch
from recirculated air back to fresh air.
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Page 175 of 424
172 Automatic climate control
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Activated charcoal filter
An activated charcoal filter markedly reduces bad odors
and removes pollutants from air entering the passenger
compartment.
To select, press ebutton. The indicator lamp in the
button illuminates.
To cancel, press ebutton. The indicator lamp in the
button goes out.The system switches automatically to the air
recirculation mode, if the carbon monoxide (CO) or
nitrogen oxides (NO
X) concentration of the outside air
increases beyond a predetermined level.
The automatic air recirculation mode does not function
if economy modeS is selected or if the outside
temperature has fallen below 40°F(5°C).
The activated charcoal filter should be switched off
when windows fog up on the inside, or if the passenger
compartment needs to be quickly heated or cooled
down.
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