2008 MERCEDES-BENZ CL-Class Comand Manual

488 Controls in detailAir vents

489 Controls in detail
Air vents
Please comply with the following instruc-
tions in order for the automatic climate
control to function optimally:

Keep the air intake grille in front of the
windshield free of snow, leaves, sticks,
and any other debris.


Always keep all air vents and grilles in
the passenger compartment free from
obstruction.
Item
1
Left side defroster vent, fixed
2
Left side air vent, adjustable
3
Left center air vent, adjustable
4
Thumbwheel for air volume control
for left center air vent
5
Thumbwheel for air volume control
for right center air vent
6
Right center air vent, adjustable
7
Right side air vent, adjustable
8
Right side defroster vent, fixed
9
Automatic climate control panel
a
Left rear center air vent, adjustable
b
Right rear center air vent, adjustable
c
Thumbwheel for right rear center air
vents
d
Thumbwheel for left rear center air
vents
Warning!
G
When operating the automatic climate con-
trol, the air that enters the passenger com-
partment through the air vents can be very
hot or very cold (depending on the set tem-
perature). This may cause burns or frostbite
to unprotected skin in the immediate area of
the air vents.
Always keep sufficient distance between un-
protected parts of the body and the air
vents. If necessary, use the air distribution
adjustment (
page 271) to direct the air to
air vents in the vehicle interior that are not
in the immediate area of unprotected skin.

490 Controls in detailAir ventsOpening and closing air vents
Center air vents
Opening: Turn thumbwheels 4
and5 upward (
page 488).

Closing: Turn thumbwheels 4 and 5
downward.
Side air vents

Opening: Turn thumbwheels next to
side air vents2 and7 upward
(page 488).

Closing: Turn thumbwheels down-
ward.
Rear center console air vents

Increasing/decreasing air volume:
Turn thumbwheelc or d to the left
or right (
page 488).
Ventilated storage compartment
The storage compartment under the front
armrest can be ventilated when the auto-
matic climate control is switched on.
1Switching ventilation off
2Switching ventilation on
The air volume is dependent on the setting
of:


air distribution control


air volume control


air vents in the dashboard
The air temperature is about the same as
that of the dashboard air vents. It cannot
be regulated separately.
i
For draft-free ventilation, move the sliders
for the center air vents 3 and 6 (
page 488)
to the middle position.
i
The temperature at the air ventsa andb
(
page 488) for rear passenger compartment
will be approximately the same as at the dash-
board center air vents.
!
Extreme temperatures can occur in the stor-
age compartment. Switch off the air vents in the
storage compartment while the heating is
switched on if you are transporting heat-sensi-
tive items in the compartment.
Keep the air vents free of obstruction.

491 Controls in detail
Automatic climate control
Automatic climate control
Automatic climate control panel
Item
1
AUTO mode for air distribution and
volume, left
2
Temperature control, left
3
Manual fan speed adjustment, left
4
Front defroster
Item
5
Air recirculation
6
Automatic climate control on/off
7
Residual engine heat and ventilation
(REST)
8
Rear window defroster
Item
9
Manual fan speed adjustment, right
a
Temperature control, right
b
AUTO mode for air distribution and
volume, right

492 Controls in detailAutomatic climate controlThe automatic climate control is operation-
al whenever the engine is running. You can
operate the climate control system in ei-
ther the automatic or manual mode. The
system cools or heats the interior depend-
ing on the selected interior temperature
and the current outside temperature.
It can only function optimally when you are
driving with the windows and the tilt/slid-
ing sunroof closed.
It is possible to completely deactivate the
climate control system (
page 493). Nearly all dust particles, pollutants and
odors are filtered out before outside air en-
ters the passenger compartment through
the air distribution system.
i
If you have the air distribution and air vol-
ume automatically controlled, you can adjust the
temperature, footwell temperature and air flow.
The following basic settings are recommended:


Automatic air distribution control
(page 491)


Temperature: 72°F (22°C) (
page 494)


Footwell temperature: 0 (
page 274)


Air flow: focused (
page 275)
Warning!
G
Follow the recommended settings for heat-
ing and cooling given on the following pages
and in the “COMAND automatic climate
control” section (
page 269). Otherwise
the windows could fog up, impairing visibili-
ty and endangering you and others.
Warning!
G
Severe conditions (e.g. strong air pollution)
may require replacement of the filter before
its scheduled replacement interval. A
clogged filter will reduce the air volume to
the interior and the windows could fog up,
impairing visibility and endangering you and
others. Have a clogged filter replaced as
soon as possible at an authorized
Mercedes-Benz Center.i
If the vehicle interior is hot, ventilate the in-
terior before driving off, see “Summer opening
feature” (
page 404). The automatic climate
control will then adjust the interior temperature
to the set value much faster.
Keep the air intake grille in front of the wind-
shield free of snow, leaves, sticks, and any other
debris.

493 Controls in detail
Automatic climate control
The following automatic climate control
functions can be operated via COMAND:
Deactivating climate control system
Deactivating: Press button´
(page 491) up or down.
The indicator lamp on the button
comes on. You will see “Climate Con-
trol OFF” in the COMAND display.

Reactivating: Press button´
(page 491) up or down.
The indicator lamp on the button goes
out. You will see the previous settings
in the COMAND display.Operating climate control system in
automatic mode
Air distribution and air volume is adjusted
automatically by the automatic climate
control system. You can also adjust the
settings for air distribution and air volume
manually.
Activating
Press buttonU (
page 491) up or
down.
The indicator lamp on the button
comes on.
Function
Page
Temperature
270
Air distribution
271
Air volume
271
Switching off cooling (“AC
OFF”)
272
Central climate control (“Mono”)
273
Footwell temperature
274
Air flow from air vents
275
Warning!
G
When the automatic climate control is
switched off, the outside air supply and cir-
culation are also switched off. Only choose
this setting for a short time. Otherwise the
windows could fog up, impairing visibility
and endangering you and others.
i
In automatic mode, cooling with dehumidify
is switched on. This function can be switched off
if necessary (
page 272).

494 Controls in detailAutomatic climate controlDeactivating
Press buttonU (
page 491) up or
down.
or

Adjust air distribution (
page 271).
or

Adjust air volume (
page 494).
The indicator lamp on buttonU
goes out. The automatic function is
switched off.
You can adjust the air distribution
(
page 271) or air volume
(page 494) manually.
Setting temperature
Use temperature controls %$
2anda (
page 491) in the center con-
sole or COMAND (
page 270) to sepa-
rately adjust the air temperature on each
side of the passenger compartment. You
should raise or lower the temperature set-
ting in small increments, preferably start-
ing at 72°F (22°C). The automatic climate
control will adjust to the set temperature
as fast as possible.

Press temperature control %$
2and/ora (
page 491) upward or
downward.
The climate control system will corre-
spondingly adjust the interior air tem-
perature.
Adjusting air volume
Use buttonsQ (
page 491) in the cen-
ter console or COMAND to separately ad-
just the air volume on each side of the
passenger compartment.

Press buttonQ up to increase or
down to decrease air volume.
The indicator lamps on buttonsU
(page 491) goes out.
The automatic function is switched off.
The air volume is adjusted correspond-
ing to the set blower speed.
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.i
Keep this setting selected only until the
windshield is clear again.

495 Controls in detail
Automatic climate control
Activating
Press button; (
page 491) up or
down.
The indicator lamp on the button
comes on.
The air conditioning switches to the follow-
ing functions automatically:


most efficient blower speed and heat-
ing power, depending on outside tem-
perature


air flows onto the windshield and the
front side windows


the air conditioning compressor
switches on at outside temperatures
above approximately 41°F (5°C) for
air-drying


the air recirculation mode is switched
offAdjustments
You can adjust the air volume and the tem-
perature when the front defroster is
switched on. The air flow will remain on the
windshield and door windows.

Press buttonQ up or down to in-
crease or decrease air volume to the
desired level.
The air volume increases/decreases to
the next higher/lower blower speed
and heating switches to the tempera-
ture that was set before the front de-
froster was switched on.
The indicator lamp on button;
goes out.
or

Press temperature control %$
2and/ora (
page 491) upward or
downward.
Heating switches to the temperature
that was set before the front defroster
was switched on.The indicator lamp on button; goes
out.
Deactivating

Press button; (
page 491) up or
down.
The indicator lamp on the button goes
out.
The previous settings are once again in
effect, except air recirculation mode
stays off.
Windshield fogged on the outside

Switch the windshield wipers on
(page 400).

Press buttonU (
page 491) up or
down.
The indicator lamp on the button
comes on.
i
The air conditioning compressor remains on
even with the indicator lamp on button;
goes out. This helps to prevent windshield from
fogging.