Page 177 of 416

177 Controls in detail
Automatic climate control
Setting the temperature
Use temperature controls (
page 175)
10for the left side or8 for the right side to
separately adjust the air temperature on
each side of the passenger compartment.
You should raise or lower the temperature
setting in small increments, preferably
starting at 72°F (22°C).
Increasing / decreasing
Press button 10 or 8 repeatedly until
the display shows the desired tempera-
ture.
The automatic climate control system
will correspondingly adjust the interior
air temperature.Adjusting the temperature for center
air vents
When outside temperatures are low, you
can manually raise the air temperature for
the center and side air vents.
Thumbwheel4 is located between the cen-
ter air vents (
page 174).
Automatic temperature control
Turn thumbwheel 4 to A.
The indicator lamp above the thumb-
wheel lights up. The temperature is au-
tomatically adjusted to the set value.Turning on warm air
Turn thumbwheel 4 in the direction of
the white marking.
Warm air will enter from the center air
vent.
Turning on cooler air
Turn thumbwheel4 in the direction of
the blue marking.
Cooler air will enter from the center air
vent.
iWhen operating the climate control
system in automatic mode, you will
only rarely need to adjust the tempera-
ture, air volume and air distribution.
Page 178 of 416

178 Controls in detailAutomatic climate controlAdjusting air distribution
Use air distribution controls12 and6
(page 175) to separately adjust the air
distribution on each side of the passenger
compartment. The following symbols are
found on the controls:Adjusting manually
Press button
U
.
The button emerges and the
h
,
V
, j
and
k
symbols become
visible.
Turn the marking on the regulator to
the desired symbol.
The air will be directed to the vents cor-
responding to this symbol.
Adjusting automatically
Press button
U
until it clicks in.
The
h
, V
, j
and
k
sym-
bols are no longer visible. The air distri-
bution is adjusted automatically.Windows fogged on the inside
Press button AC
OFF
to switch on the air
conditioning (
page 175).
The indicator lamp in the button goes
out.
Press button
O
to switch off the air
recirculation (
page 175).
The indicator lamp on the button goes
out.
Adjust left and right air vents1 and6
upwards (
page 174).
Set blower to the maximum blower
speed.
Increase temperature setting.
Open side air vents9 and direct them
onto the side windows (
page 174).
Symbol
Function
h
Directs air through the cen-
ter air vents
j
Directs air to the windows
V
Directs air into the entire
vehicle interior
k
Directs air to the footwells
Page 179 of 416

179 Controls in detail
Automatic climate control
Windshield fogged on the outside
Switch the windshield wipers on.
Press on both
U
buttons until they
click in.
The
h
, V
, j
and
k
sym-
bols are no longer visible.
Press button
O
to switch off the air
recirculation (
page 175).
The indicator lamp on the button goes
out.
Set blower to the maximum blower
speed.
Adjusting air volume
Use air volume control9 (
page 175) for
both automatic and manual air volume ad-
justment.
Adjusting automatically
Press theA on air volume switch9
(page 175).
The display shows “AUTO.” The air vol-
ume is adjusted automatically.
Adjusting manually
Reducing air volume
Press switch9 down until the desired
air volume is reached. The display
shows the current level.
Increasing air volume
Press switch9 up until the desired air
volume is reached. The display shows
the current level.
Maximum cooling MAXCOOL
If the left and right air distribution controls
as well as the air volume control are set
to
U
and there is a high need for cool-
ing, the display “MAXCOOL” appears.
This provides the fastest possible cooling
of the vehicle interior (when windows and
sliding/pop-up roof are closed).
Page 180 of 416

180 Controls in detailAutomatic climate controlDefrosting
Activating
Press button
P
(page 175).
The indicator lamp on the button lights
up.
Switch off air recirculation, if selected.
Press button
O
(page 175).
The indicator lamp on the button goes
out.
Close center air vents.
Adjust side air vents upwards.
Deactivating
Press button
P
(page 175).
The indicator lamp on the button goes
out. Defrosting is turned off.
Air recirculation mode
Switch to air recirculation mode to prevent
unpleasant odors from entering the vehicle
from the outside. This setting cuts off the
intake of outside air and recirculates the
air in the passenger compartment.
Activating
Press button
O
(page 175).
The indicator lamp on the button lights
up.
iThese settings should only be selected
for a short time.
Warning!
G
When the outside temperature is below
41°F (5°C), only switch to air recirculation
mode for short periods to prevent window
fogging.iIf you keep button
O
pressed, the
side windows and the sliding/pop-up
roof will be closed.
Warning!
G
Never operate the side windows and the
sliding pop/pop-up roof if there is the possi-
bility of anyone being harmed by the closing
procedure.
In the event that the procedure causes po-
tential danger, the closing of the side win-
dows can be immediately halted by pressing
the respective window switch. The closing of
the sliding/pop-up roof can be immediately
halted by moving the sliding/pop-up roof
switch in the overhead control panel in any
direction.
Page 181 of 416

181 Controls in detail
Automatic climate control
Deactivating
Press button
O
(page 175).
The indicator lamp on the button goes
out.The air recirculation mode is deactivated
automatically:
after five minutes if the outside temper-
ature is below approximately 41°F
(5 °C)
after five minutes if the air conditioning
is turned off
after 30 minutes if the outside temper-
ature is above approximately 41°F
(5 °C)
At outside temperatures above 79°F
(26 °C) the system will not automatically
switch back to outside air. A quantity of
outside air is added after approximately
30 minutes.
iThe air recirculation mode is activated
automatically:
at high outside temperatures
if the concentration of carbon mon-
oxide and nitrogen oxide in the out-
side air increases, for example in a
tunnel.
Please note that the charcoal filter
must be activated (
page 182) for
the air recirculation mode to be ac-
tivated automatically.
If you have turned off the air condition-
ing (
page 184) or the outside tem-
perature is below 41°F (5°C), the air
recirculation mode will not switch on
automatically.
iIf you keep button
O
pressed, the
side windows and the sliding/pop-up
roof return to their previous position.
Page 182 of 416

182 Controls in detailAutomatic climate controlCharcoal filter
An activated charcoal filter markedly re-
duces bad odors and removes pollutants
from air entering the passenger compart-
ment.
Activating
Press button
e
(page 175).
The indicator lamp on the button lights
up.
Deactivating
Press button
e
(page 175).
The indicator lamp on the button goes
out.The system automatically switches to the
air recirculation mode if the carbon
monoxide (CO) or nitrogen oxide (NO
X)
concentration of the outside air increases
beyond a predetermined level.
The automatic air recirculation mode does
not function if economy mode AC
OFF
is se-
lected or if the outside temperature has
fallen below 41°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.
iIf you keep button
e
pressed, the
side windows and the sliding/pop-up
roof will be closed.
Warning!
G
Never operate the side windows and the
sliding pop/pop-up roof if there is the possi-
bility of anyone being harmed by the closing
procedure.
In the event that the procedure causes po-
tential danger, the closing of the side win-
dows can be immediately halted by pressing
the respective window switch. The closing of
the sliding/pop-up roof can be immediately
halted by moving the sliding/pop-up roof
switch in the overhead control panel in any
direction.
iIf you keep button
e
pressed, the
side windows and the sliding/pop-up
roof will be returned to their previous
position.
Page 183 of 416

183 Controls in detail
Automatic climate control
Rear window defroster
The rear window defroster uses a large
amount of power. To keep battery drain to
a minimum, switch off the defroster as
soon as the rear window is clear. The de-
froster is automatically deactivated after
approximately 6 to 17 minutes of opera-
tion depending on the outside tempera-
ture.
Activating
Press button
F
(page 175).
The indicator lamp on the button lights
up.
Deactivating
Press button
F
(page 175) again.
The indicator lamp on the button goes
out.Deactivating the climate control sys-
tem
Deactivating
It is possible to completely deactivate the
automatic climate control system.
Press button
M
(page 175).
The display shows “0”.
Reactivating
There are several ways to reactivate the
automatic climate control system:
Press one of the following buttons, M
, P
, U
, a temperature con-
trol switch (
page 175) or air volume
switch 9 on the automatic climate con-
trol panel.
Warning!
G
Any accumulation of snow and ice should be
removed from the rear window before driv-
ing. Visibility could otherwise be impaired,
endangering you and others.!If the rear window defroster switches
off too soon and the indicator lamp
starts blinking, this means that too
many electrical consumers are operat-
ing simultaneously and there is insuffi-
cient voltage in the battery. The system
responds automatically by deactivating
the rear window defroster.
As soon as the battery has sufficient
voltage, the rear window defroster au-
tomatically switches on again.
Page 184 of 416

184 Controls in detailAutomatic climate controlAir conditioning
The air conditioning is operational while
the engine is running and cools the interior
air to the temperature you have set.
Deactivating
It is possible to deactivate the air condi-
tioning (cooling) function of the automatic
climate control system. The air in the vehi-
cle will then no longer be cooled or dehu-
midified.
Press buttonAC
OFF
(page 175).
The indicator lamp on the
buttonAC
OFF
lights up.Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.
PressAC
OFF
again (
page 175).
The indicator lamp on the AC
OFF
but-
ton goes out.
The air conditioning uses the refrigerant
R134a. This refrigerant is free of CFCs
which are harmful to the ozone layer.
Storage compartment ventilation
The storage compartment below the front
armrest (
page 225) has its own air vent.
Ventilation of the storage compartment
below the front armrest is possible only
when the climate control system is on. The
air volume depends on the setting of the
air distribution control, the air volume con-
trol, and the air vents in the dashboard.
The switch is located inside the storage
compartment in the front armrest
(
page 225).
Opening air vent
Push upper portion of switch.
Closing air vent
Push lower portion of switch.
iCondensation may drip out from under-
neath the vehicle. This is normal and
not an indication of a malfunction.
!If the AC
OFF
button on the automatic
climate control panel starts to blink,
the air conditioning may be losing re-
frigerant. The compressor was turned
off. The air conditioning cannot be
turned on again.
Have the air conditioning checked at
the nearest authorized Mercedes-Benz
Center.