climate control MERCEDES-BENZ S-Class 2008 W221 Comand Manual

277 Control systems
COMAND automatic climate control
The “AC
OFF” function is used to permanent-
ly switch off the cooling function of the au-
tomatic climate control system.

Select climate control settings
Cen-
tral climate control menu.

Selecting “AC
OFF”: Slide qmr or
rotateymz.

Confirming selection: Press n.
A checkmark appears when the cooling
is switched off.
“AC
OFF” appears in the central menu of
the climate control settings.Selecting “Mono” mode
“Mono” is used to adjust the climate zones
for the entire vehicle at the same time.
When the “Mono” function is switched on
and you change the climate on the driver’s
side, these changes will be carried out in
the same manner for all climate zones.

Select climate control settings
Cen-
tral climate control menu.

Selecting “Mono”: Slide qmr or
rotateymz.

Confirming selection: Press n.
A checkmark appears when the func-
tion has been selected.

Exiting menu: Press back button L
in the center console (
page 88) or
slideomp.
i
Condensation may drip out from underneath
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 conditioning is
losing refrigerant. The compressor has turned it-
self off.
Have the air conditioning checked at the nearest
authorized Mercedes-Benz Center.

278 Control systemsCOMAND automatic climate controlThe “Mono” function is automatically
switched off when you:

change an automatic climate control
setting for the front passenger’s side
using COMAND


operate a button from the automatic
climate control for the front passen-
ger’s side


operate one of the buttons for the rear
climate control systemAdjusting footwell temperature
The “Footwell Temperature” function is
used to adjust the temperature difference
between the footwell and the rest of the
passenger compartment.
The higher the selected value, the higher
the temperature in the footwell will be.

Select climate control settings
Cen-
tral climate control menu.

Selecting “Footwell Temperature”:
Slide qmr or rotate ymz and then
pressn.

Changing temperature difference:
Slide qmr or rotate ymz.

Exiting menu: Press n, back
buttonL in the center console
(page 88) or slideomp.
The setting is saved.
i
In automatic mode, this setting optimizes
the footwell temperature when outside tempera-
tures are low.

279 Control systems
COMAND automatic climate control
Adjusting air flow from air vents
The “Airflow” setting defines air distribu-
tion and air volume in automatic mode:

“Focused” (default setting, increased
air flow)


“Medium” (reduced air flow)


“Diffuse” (minimal air flow)

Select climate control settings
Cen-
tral climate control menu
“Airflow”.
A selection list appears.
The current setting is indicated by a
dotR.

Changing air flow: Slide qmr or
rotateymz.

Confirming selection: Press n.Operating rear climate control* from
the front
The “Rear)” function is used to oper-
ate the rear climate control via COMAND
and the buttons on the center console con-
trol unit (
page 510).
Switching on rear climate control oper-
ation from the front

Select climate control settings
Cen-
tral climate control menu.

Selecting “Rear)”: Slide qmr or
rotate ymz.

Confirming selection: Press n.
i
In automatic mode, this setting optimizes
the air flow when outside temperatures are high.
i
When the interior ambient temperature of
the vehicle is very hot and the automatic climate
control is cooling the interior, the setting for air
flow is temporarily overridden.


280 Control systemsCOMAND automatic climate control
In the climate control settings, “)”
appears in the central menu. The rear
climate control can be operated from
the front.
Climate control settings, rear climate
control1Rear temperature, left
2Rear air distribution, left
3Rear air volume
4Central menu for rear climate control
5Rear air distribution, right
6Rear temperature, rightThe rear climate control is operated in the
same manner as the climate control sys-
tem for the driver’s and front passenger’s
side (
page 273).
Central menu for rear climate control
In the central menu for the rear climate
control, you can:


switch back to operating the front cli-
mate control system


switch off the rear climate control


switch the automatic function of the
rear climate control from automatic to
manual

Select climate control settings
Cen-
tral climate control menu.


281 Control systems
COMAND automatic climate control
Switching off rear climate control oper-
ation from the front
Select climate control settings
Cen-
tral climate control menu.
The current setting is indicated by a
dotR.

Selecting “Front Climate Control”:
Slide qmr or rotate ymz.

Confirming selection: Press n.
The climate control settings shows the
climate control settings for the driver
and front passenger.Switching off rear climate control

Select climate control settings
Cen-
tral climate control menu.
The current setting is indicated by a
dotR.

Selecting “Rear Climate Control
OFF”: Slide qmr or rotate ymz.

Confirming selection: Press n.
The rear climate control is switched off.Switching on the automatic function of
the rear climate control

Select climate control settings
Cen-
tral climate control menu.
The current setting is indicated by a
dotR.

Selecting “Rear Automatic”:
Slideqmr or rotate ymz.

Confirming selection: Press n.
The automatic function of the rear cli-
mate control is switched on.

357 Controls in detail
Locking and unlocking
Starter switch positions
Seats
Steering wheel
Mirrors
Memory function
Fastening the seat belts
Lighting
Windshield wipers
Power windows
Driving and parkingAutomatic transmission
Instrument cluster
Driving systems
Air vents
Automatic climate control
Trunk
Power tilt/sliding sunroof
Panorama roof with power
tilt/sliding panel*
Loading and storing
Useful features

411 Controls in detail
Power windows

Switch on the ignition (
page 370).

Opening: Press the lower part of
switch1 to 4 (
page 410) to the re-
sistance point.
The corresponding window will move
downwards until you release the
switch.

Closing: Press the upper part of
switch1 to 4 (
page 410) to the re-
sistance point.
The corresponding window will move
upwards until you release the switch.
If the window encounters an obstruction
that blocks its path in a circumstance where
you are closing the window by pressing and
holding the switch, by pressing and holding
button ‹ on the SmartKey or SmartKey
with KEYLESS-GO*, by pressing and holding
the sensor surface (vehicles with
KEYLESS-GO*) on an outside door handle,
or by pressing and holding button, on
the climate control panel, the automatic re-
versal function will not operate.
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.
i
You can also open or close the windows us-
ing the SmartKey, see “Summer opening fea-
ture” (page 412) and “Convenience closing
feature” (page 413).
Depending on current position, the windows may
also open or close when the air recirculation
button, (page 501) is pressed and held
for 2 seconds.
i
Operating the windows from the rear is not
possible if you activate the override switch
(
page 64).
i
If PRE-SAFE
® has been activated, the door
windows close automatically until only a small
gap remains.
i
With the SmartKey in starter switch
position0 or removed from the starter switch,
the power windows can be operated:


until you open the driver’s or front passenger
door


for at least 5 minutes if no door was opened
Warning!
G
If you press and hold the switch up when
closing the window, and upward movement
of the window is blocked by some obstruc-
tion including but not limited to arms, hands,
fingers, etc., the automatic reversal will not
operate.


493 Controls in detail
Driving systems
Dirty or fogged-up windshield
If the windshield in front of the camera is
fogged up on the inside or outside or if it is
dirty, the Night View Assist image is dimin-
ished.Removing condensation

Check settings of automatic climate
control and change them, if necessary
(page 501).

Swing the camera cover downward
(page 621).
Cleaning inside of windshield

Clean inside of windshield in front of
camera with a soft, non-scratching
cloth (
page 621).
Warning!
G
Please do not forget that your primary re-
sponsibility is to drive the vehicle. A driver’s
attention to the road must always be
his/her primary focus when driving. For
your safety and the safety of others, stop be-
fore trying to remove window fogging or
cleaning the window in front of the Night
View Assist camera.
Bear in mind that at a speed of just 30 mph
(approximately 50 km/h), your vehicle is
covering a distance of 44 feet (approximate-
ly 14 m) every second.

499 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 defroster vent, fixed
8
Right side air vent, adjustable
9
Front climate control panel
a
Thumbwheel for left rear center air
vents
b
Left rear center air vent, adjustable
c
Right rear center air vent, adjustable
d
Thumbwheel for right rear center air
vents
e
Rear climate control panel*
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 275) to direct the air to
air vents in the vehicle interior that are not
in the immediate area of unprotected skin.

500 Controls in detailAir ventsOpening and closing air vents
Center air vents
Opening: Turn thumbwheels 4
and5 upward (
page 498).

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

Opening: Turn thumbwheels next to
side air vents2 and8 upward
(page 498).

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

Increasing/decreasing air volume:
Turn thumbwheelsa or d to the left
or right (
page 498).Ventilated storage compartment
(Canada only)
In vehicles without rear passenger com-
partment climate control*: the storage
compartment under the front armrest can
be ventilated when the automatic 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 498)
to the middle position.
i
Vehicles without rear passenger compart-
ment climate control*:
The temperature at the air ventsb andc
(
page 498) 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.