MERCEDES-BENZ CL-Class 2008 C216 Comand Manual

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.

496 Controls in detailAutomatic climate controlRear window defroster
Activating
Switch on the ignition (
page 365).

Press button< (
page 491) up or
down.
The indicator lamp on the button
comes on.
Deactivating

Press button< (
page 491) up or
down.
The indicator lamp on the button goes
out.
Maximum cooling MAXCOOL (USA only)
If U is selected on both the left and
right side and there is a high demand for
cooling, the display “MAXCOOL” appears
in the COMAND display.
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 in a
tunnel). This setting cuts off the intake of
outside air and recirculates the air in the
passenger compartment.
!
The rear window defroster uses a large
amount of power. To keep battery drain to a min-
imum, switch off the defroster as soon as the
rear window is clear.
i
The defroster is automatically deactivated
after some time of operation depending on the
outside temperature.
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.i
If the rear window defroster switches off too
soon and the indicator lamp goes out, this indi-
cates that too many electrical consumers are op-
erating simultaneously and the load on the
battery is reducing available voltage. The system
responds automatically by deactivating the rear
window defroster.
i
Maximum cooling MAXCOOL is only avail-
able when the engine is running.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 272) is activated, or
press button;.

497 Controls in detail
Automatic climate control

Activating: Press button,
(page 491) up or down.
The indicator lamp on the button
comes on.

Deactivating: Press button,
(page 491) up or down.
The indicator lamp on the button goes
out.Air recirculation mode with conve-
nience closing or opening feature
i
The air recirculation mode is activated auto-
matically at high outside temperatures.
The indicator lamp on button, is not lit when
the air recirculation mode is automatically acti-
vated.
A quantity of outside air is added when the cool-
ing demand is not at maximum.
If the air conditioning has been turned off
(
page 272) or the outside temperature is be-
low 41°F (5°C), the air recirculation mode will
not switch on automatically.
i
The manually selected air recirculation
mode is deactivated automatically:


after 5 minutes if the outside temperature is
below approximately 41°F (5°C)


after 5 minutes if the air conditioning is
turned off


after 30 minutes if the outside temperature
is above approximately 41°F (5°C)
Warning!
G
Never operate the side windows and the
tilt/sliding sunroof if there is the possibility
of anyone being harmed by the closing pro-
cedure.
When using the air recirculation mode with
convenience closing feature, should the up-
ward movement of a window be blocked by
some obstruction including but not limited
to arms, hands, fingers, etc., the automatic
reversal feature will not operate.
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 tilt/sliding sunroof can be immediately
halted by moving the tilt/sliding sunroof
switch in the overhead control panel in any
direction.


498 Controls in detailAutomatic climate control
Convenience closing: Press
button
,
for approximately
2 seconds.
The side windows and/or tilt/sliding
sunroof will close. You can release
button
,
once the closing proce-
dure has begun. The windows and
tilt/sliding sunroof continue closing
until they are fully closed. The indicator
lamp on the button comes on. The air
recirculation mode is activated.

Convenience opening: Press
button
,
for approximately
2 seconds.The side windows and/or tilt/sliding
sunroof will return to their previous po-
sition. You can release button
,
once the opening procedure has be-
gun. The windows and tilt/sliding sun-
roof continue opening until they have
reached their previous positions. The
indicator lamp on the button goes out.
The air recirculation mode is deactivat-
ed.
Residual engine heat and ventilation
With the engine switched off, it is possible
to continue to heat or ventilate the interior.
This feature makes use of the residual heat
produced by the engine.
The closing of the side windows and the
tilt/sliding sunroof can be reversed by again
pressing and holding button,.
i
A window or tilt/sliding sunroof will only re-
turn to its previous position if it has not been
moved to another position using the respective
window switch or tilt/sliding sunroof switch af-
ter it was closed with button,.
A window or tilt/sliding sunroof that has been
moved will remain in its current position if
button, is used to reopen the remaining
windows or tilt/sliding sunroof.
i
If you switch on the residual heat function
when outside temperatures are high, only the
ventilation will be switched on.
i
Regardless of the selected air volume, the
blower operates at low speed when heating. In
case of ventilation the blower operates at higher
speed.
i
How long the system will provide heating de-
pends on


the coolant temperature


the temperature set by the operator


499 Controls in detail
Automatic climate control
Activating
Switch off the ignition (
page 365).

Press buttonT (
page 491) up or
down.
The indicator lamp on the button
comes on.Deactivating

Press buttonT (
page 491) up or
down.
The indicator lamp on the button goes
out.
i
The residual heat is automatically turned off:


when the ignition is switched on


after approximately 30 minutes


if the battery voltage drops


if the coolant temperature is too low