Page 223 of 521

222 Controls in detail4-zone automatic climate control*Adjusting air distribution
Use the air distribution controls1 and7
(page 216) or (
page 217) to separate-
ly adjust the air distribution on each side of
the passenger compartment.
The following symbols are located on the
controls:
Turn air distribution controls1
and7 (
page 216) or (
page 217)
on each side of the passenger compart-
ment to the desired symbol.
The indicator lamps on the
buttonsU go out. The automatic air
distribution is switched off. The air dis-
tribution is controlled according to the
selected control setting.
Opening the cockpit air vent and center
air vents
Turn thumbwheels 1 and 5
(page 214) upward.
The cockpit air vent 3 and the side air
vents 2 and 4 are open.Closing the cockpit air vent and center
air vents
Turn thumbwheels 1 and 5
(page 214) downward.
The cockpit air vent 3 and the side air
vents 2 and 4 are closed.
Opening the side air vents
Turn thumbwheels 8 and a
(page 214) upward.
The side air vents 7 and b are open.
Closing the side air vents
Turn thumbwheels 8 and a
(page 214) downward.
The side air vents 7 and b are
closed.
Symbol
Function
a
Directs air through the cock-
pit, side and rear passenger
compartment air vents
Z
Directs air to the windshield
and through the side air vents
X
Directs air into the entire vehi-
cle interior
Y
Directs air to the footwells
iYou can also turn the air distribution
control to a position between two sym-
bols.
Page 224 of 521

223 Controls in detail
4-zone automatic climate control*
Adjusting air volume
Use buttonsU (
page 216) or
(
page 217) for automatic mode or air
volume buttons orQ
(page 216) or (
page 217) to adjust air
volume manually.
Nine blower speeds are available.
Press button to decrease or
buttonQ to increase air volume to
the desired level.
The indicator lamps on the
buttonsU go out.
AUTO
disappears
in the display4 (
page 216) or
(
page 217) and the automatic mode
is switched off. The selected blower
speed is shown in the display4.
Front defroster
You can use this setting to defrost the
windshield, for example if it is iced up.
You can also defog the windshield and the
side windows.
Activating
Press buttonP or 0
(page 216) or (
page 217).
The indicator lamp on the button
comes on. Display4 (
page 216) or
(
page 217) is cleared.The air conditioning switches
automatically to the following functions:
cooling on to dehumidify
maximum blowing and heating
power (depends on cooling
temperature)
air flows onto the windshield and
the front side windows
the air recirculation mode is
switched off
Deactivating
Press buttonPor 0
(page 216) or (
page 217) again.
The indicator lamp on the button goes
out. Defrosting is turned off.
The previous settings are once again in
effect.
iKeep this setting selected only until the
windshield or the side windows are
clear again.
iThe cooling remains switched on.
Page 225 of 521

224 Controls in detail4-zone automatic climate control*Windshield fogged on the outside
Switch the windshield wipers on
(page 55).
Press one buttonU (
page 216) or
(
page 217).
The indicator lamp on the button
comes on.
AUTO
appears in the
display4 (
page 216) or
(
page 217). The air volume and air
distribution are adjusted automatically.
If the automatic mode of the climate con-
trol is switched off:
Turn air distribution control1 and 7
to a or Y (
page 216) or
(
page 217).
Maximum cooling MAX COOL
If the left and right air distribution controls
as well as the airflow volume control are
set toU and there is a high need for
cooling, the display “
MAX COOL
” appears in
the front and rear display (
page 229).
This provides the fastest possible cooling
of the vehicle interior (when windows and
tilt/sliding sunroof* are closed).
Air recirculation mode
Switch to air recirculation mode to prevent
unpleasant odors from entering the vehicle
from the outside (e.g. before driving
through a tunnel). This setting cuts off the
intake of outside air and recirculates the
air in the passenger compartment.
iKeep this setting selected only until the
windshield is clear again.
Warning!
G
Fogged windows impair visibility, endanger-
ing you and others. If the windows begin to
fog on the inside, switching off the air
recirculation mode immediately should clear
interior window fogging. If interior window
fogging persists, make sure the air
conditioning (
page 227) is activated, or
press buttonP or0.
Page 226 of 521

225 Controls in detail
4-zone automatic climate control*
Activating
Press button, (
page 216) or
(
page 217).
The indicator lamp on the button
comes on.
iThe air recirculation mode is activated
automatically at high outside tempera-
tures and if the concentration of car-
bon monoxide and nitrogen oxide in the
outside air increases, for example in a
tunnel.
The indicator lamp on button, is
not lit when the air recirculation mode
is automatically switched on.
A quantity of outside air is added after
approximately 30 minutes.
Warning!
G
Never operate the side windows and
tilt/sliding sunroof* if there is the possibility
of anyone being harmed by the opening or
closing procedure.
In case the procedure causes potential dan-
ger:
The closing of the side windows can be im-
mediately halted by pressing or pulling the
respective window switch. The closing of the
tilt/sliding sunroof can be immediately halt-
ed by moving the switch for the tilt/sliding
sunroof in any direction.
The closing of the side windows and the
tilt/sliding sunroof can be reversed by again
pressing and holding the, button.
iPress and hold button, for approx-
imately 2 seconds. The side windows
and tilt/sliding sunroof* will close. You
can release button, once the clos-
ing procedure has begun. The windows
and tilt/sliding sunroof* continue clos-
ing until they are fully closed.
Page 227 of 521

226 Controls in detail4-zone automatic climate control*Deactivating
Press button, (
page 216) or
(
page 217).
The indicator lamp on the button goes
out.Combination filter with pollutant-sensi-
tive air-recirculation mode
The combination filter reduces pollutants
and unpleasant odors in the outside air.
The pollutant-sensitive air-recirculation
mode automatically switches off the sup-
ply of outside air when pollutants are de-
tected in the air.
iThe air recirculation mode is deactivat-
ed automatically:
after 5 minutes if the outside tem-
perature is below
approximately 41°F (5°C)
after 5 minutes if the air condition-
ing is turned off
after 30 minutes if the outside tem-
perature is above approximately
41°F (5°C)
iPress and hold button, for
approximately 2 seconds. The side
windows and or tilt/sliding sunroof*
will return to their previous position.
You can release button, once the
opening procedure has begun. The win-
dows and tilt/sliding sunroof* contin-
ue opening until they have reached
their previous position.
A window or tilt/sliding sunroof* will
only return to its previous position if it
has not been moved to another posi-
tion using the respective window
switch or tilt/sliding sunroof* switch
after it was closed with button,.
A window or tilt/sliding sunroof* that
has been moved will remain in its cur-
rent position if button, is used to
re-open the remaining windows or
tilt/sliding sunroof*.
iThe pollutant-sensitive air-recirculation
mode is not possible if you have
switched off the air conditioning or if
the temperature falls below 41°F
(5°C).
Page 228 of 521

227 Controls in detail
4-zone automatic climate control*
Air conditioning
The cooling function, only operational
when the engine is running, cools the vehi-
cle interior down to the selected tempera-
ture. The cooling function also
dehumidifies the air in the vehicle interior,
thus preventing the windows from fogging
up.Deactivating
It is possible to deactivate the air condi-
tioning (cooling) function of the climate
control system. The air in the vehicle will
then no longer be cooled or dehumidified.
Press button2 (
page 216) or
(
page 217).
The indicator lamp on the button goes
out.
Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.
Press button2 (
page 216) or
(
page 217) again.
The indicator lamp on the button
comes on.
The air conditioning uses the refrigerant
R134a. This refrigerant is free of CFCs
which are harmful to the ozone layer.
iCondensation may drip out from under-
neath the vehicle. This is normal and
not an indication of a malfunction.Warning!
G
If you turn off the cooling function, the
vehicle will not be cooled when weather
conditions are warm. The windows can fog
up more quickly. Window fogging may
impair visibility and endanger you and
others.
!If the air conditioning cannot be turned
on again, this indicates that the air con-
ditioning is losing refrigerant. The com-
pressor has turned itself off.
Have the air conditioning checked at
the nearest authorized Mercedes-Benz
Center.
Page 229 of 521

228 Controls in detail4-zone automatic climate control*Residual heat and ventilation (Canada only)
With the engine switched off, it is possible
to continue to heat or ventilate the interior
for up to 30 minutes. This feature makes
use of the residual heat produced by the
engine.
Activating
Switch off the ignition.
Press buttonT (
page 217).
REST in the display4 (page 217)
comes on.Deactivating
Press buttonT (
page 217) again.
REST in the display4 (page 217)
goes out.
iIf you switch on the residual heat
function when temperatures are high,
only the ventilation will be switched on.iRegardless of the selected air volume,
the blower operates at low speed.
iHow long the system will provide heat-
ing depends on
the coolant temperature
the temperature set by the operator
The blower will run at speed setting 1
regardless of the air distribution con-
trol setting.
iThe residual heat is automatically
turned off:
when the ignition is switched on
after about 30 minutes
if the battery voltage drops
if the coolant temperature is too
low
Page 230 of 521

229 Controls in detail
4-zone automatic climate control*
Rear climate control
The rear climate control is adjusted via the
front climate control panel (
page 216) or
(
page 217) or the rear climate control
panel.
The rear climate control panel is located in
the rear center console.
Setting the temperature
Use temperature control rocker
switches4 and6 to separately adjust
the air temperature on each side of the
rear passenger compartment.You should raise or lower the temperature
setting in small increments, preferably
starting at 72°F (22°C). The adjusted tem-
perature appears in the display 5. The
rear climate control will adjust to the set
temperature as fast as possible.
1Temperature, left
2Temperature, right
Adjust the temperature to the desired
setting for each side of the passenger
compartment using the left and right
temperature buttons.
The temperature in the rear passenger
compartment is adjusted automatical-
ly.
1
Left rear center air vent, adjustable
2
Right rear center air vent, adjustable
3
Thumbwheel for air volume control
for right rear center air vent
4
Temperature rocker switch, right
5
Display
6
Temperature rocker switch, left
7
Thumbwheel for air volume control
for left rear center air ventiYou can also adjust the rear tempera-
ture using the front climate control
panel (
page 216) or (
page 217).