2008 MERCEDES-BENZ CL-Class warning

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).

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.


500 Controls in detailTrunkOpening trunk
You can open the trunk if the vehicle is sta-
tionary.
A minimum height clearance of 6.0 ft
(1.8 m) is required to open the trunk lid.Opening trunk from outside
1Trunk lid handle

Press and hold button Š on the
SmartKey or SmartKey with
KEYLESS-GO* until trunk unlocks and
begins to open.
or

Pull on handle1.
In vehicles without KEYLESS-GO*: The
vehicle must be unlocked.Opening trunk from inside
1Remote trunk opening/closing switch

Press and hold switch1 until the
trunk is opened.
The indicator lamp in switch1 comes
on and remains lit until the trunk is
closed.
To interrupt the opening procedure:

Release switch1.
Warning!
G
Make sure the trunk is closed when the en-
gine is running and while driving. Among
other dangers, deadly carbon monoxide
(CO) gases may enter the vehicle interior re-
sulting in unconsciousness and death.!
The trunk lid swings open upwards automat-
ically. Always make sure that there is sufficient
overhead clearance.
To stop the opening procedure, press
buttonŠ on the SmartKey or SmartKey with
KEYLESS-GO*.

501 Controls in detailTrunk
Trunk opening-height restriction
The trunk lid opening height can be limited
when transporting goods on a roof rack
(e.g. presence of an optional MB sport lug-
gage container). When activated, the trunk
opens to approximately the height of the
roof edge.
Activate the limiting opening height of
trunk lid using the COMAND system
(page 268).
Closing trunkClosing trunk from outside manually
1Handle

Lower trunk lid by pulling firmly on
handle1.

Close the trunk with hands placed flat
on the trunk lid.
The power closing assist automatically en-
sures that the trunk lid is pulled closed
completely (
page 363).
i
Do not place the SmartKey in the open
trunk. You may lock yourself out.
i
If the vehicle was previously centrally
locked, the trunk will lock automatically after
closing it. All turn signal lamps flash three times
to confirm locking.
Vehicles with KEYLESS-GO*: To prevent a possi-
ble inadvertent lockout, the trunk will open auto-
matically if a SmartKey with KEYLESS-GO* is
recognized inside the vehicle or in the trunk.
The vehicle is only locked when the turn signals
flash three times. If you are carrying a second SmartKey with KEYLESS-GO* with you, you can
still lock the vehicle.
Warning!
G
To prevent possible personal injury, always
keep hands and fingers away from the trunk
lid opening when closing the trunk. Be espe-
cially careful when small children are
around.
When leaving the vehicle, always remove the
SmartKey or SmartKey with KEYLESS-GO*
from the starter switch, take it with you, and
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an
unlocked vehicle. A child’s unsupervised ac-
cess to a vehicle could result in an accident
and/or serious personal injury.

502 Controls in detailTrunkClosing trunk from inside automatically
1Remote trunk opening/closing switch

Press and hold switch1 until the
trunk is closed.
The indicator lamp in the switch goes
out when the trunk is closed.
To interrupt the closing procedure:

Release switch1.Closing trunk from outside
automatically
Warning!
G
Maintain sight of trunk area while operating
door mounted switch. Monitor the closing
procedure carefully to make sure no one is
in danger of being injured.
To interrupt the closing procedure, release
the door mounted remote trunk open-
ing/closing switch.
Even with the SmartKey or SmartKey with
KEYLESS-GO* removed from the starter
switch or the SmartKey with KEYLESS-GO*
removed from the vehicle, the remote trunk
opening/closing switch can be operated.
Therefore, do not leave children unattended
in the vehicle, or with access to an unlocked
vehicle. A child’s unsupervised access to a
vehicle could result in an accident and/or
serious personal injury.
i
If the trunk lid comes into contact with an
object while closing (e.g. luggage that has been
piled too high) in the upper motion sequence, the
closing procedure is stopped and the trunk re-
opens slightly.
i
You can also close the trunk by hand.
Warning!
G
Monitor the closing procedure carefully to
make sure no one is in danger of being in-
jured. To prevent possible personal injury,
always keep hands and fingers away from
the trunk lid opening when closing the trunk.
Be especially careful when small children
are around. To stop the closing procedure,
do one of the following:

press button Š on the SmartKey or
SmartKey with KEYLESS-GO


press the trunk opening/closing switch
(on the driver’s door)


press the trunk closing switch


press the KEYLESS-GO locking/closing
switch*


pull the trunk lid handle

506 Controls in detailPower tilt/sliding sunroofOpening and closing power tilt/sliding sunroofWarning!
G
When closing the tilt/sliding sunroof, make
sure that there is no danger of anyone being
harmed by the closing procedure.
If the tilt/sliding sunroof encounters an ob-
struction that blocks its path in a circum-
stance where you are closing the tilt/sliding
sunroof by moving the tilt/sliding sunroof
switch past the resistance point, or by
pressing and holding button‹on the
SmartKey, by pressing and holding the sen-
sor surface (vehicles with KEYLESS-GO*) on
the outside door handle, the automatic re-
versal function will not operate.
The opening/closing procedure of the
tilt/sliding sunroof can be immediately halt-
ed by releasing the switch or, if the switch
was moved past the resistance point and re-
leased, by moving the switch in any direc-
tion.
The tilt/sliding sunroof is made out of glass.
In the event of an accident, the glass may
shatter. This may result in an opening in the
roof.
In a vehicle rollover, occupants not wearing
their seat belts or not wearing them properly
may be thrown out of the opening. Such an
opening also presents a potential for injury
for occupants wearing their seat belts
properly as entire body parts or portions of
them may protrude from the passenger
compartment.
When leaving the vehicle, always remove the
SmartKey or SmartKey with KEYLESS-GO*
from the starter switch, take it with you, and
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an
unlocked vehicle. A child’s unsupervised ac-
cess to a vehicle could result in an accident
and/or serious personal injury.!
To avoid damaging the seals, do not trans-
port any objects with sharp edges which can
stick out of the tilt/sliding sunroof.Do not open the tilt/sliding sunroof if there is
snow or ice on the roof, as this could result in
malfunctions.
If you cannot open or close the tilt/sliding sun-
roof due to a malfunction contact Roadside As-
sistance or an authorized Mercedes-Benz
Center.
!
Please keep in mind that weather conditions
can sometimes change rapidly. Make sure to
close the tilt/sliding sunroof when leaving the
vehicle. If water enters the vehicle interior, vehi-
cle electronics could be damaged which is not
covered by the Mercedes-Benz Limited
Warranty.
i
When the tilt/sliding sunroof is open, reso-
nance noises may result in addition to the usual
wind noises. They are caused by minimal pres-
sure changes in the passenger compartment. To
reduce or eliminate these noises, change the po-
sition of the tilt/sliding sunroof or open a side
window slightly.