Page 179 of 442

179 Controls in detail
Climate control
Adjusting center air vents:
The thumbwheels for left2 and right6
center air vents are automatically posi-
tioned for optimum interior airflow. In this
position, center air vent4 and adjustable
left and right center vents3 and5 are
fully opened.
Heating:
Only in manual mode is it possible to lower
the temperature in the headroom by regu-
lating the cold-airflow using
thumbwheel7 (
page 174).Windshield fogged on the outside
Switch the windshield wipers on
(page 48).
Press the Ubutton.
The indicator lamp on the button
comes on.
Adjusting air volume
Adjusting manually
Five blower speeds are available.
Press to decrease orQ to in-
crease air volume to the desired level.
The
Auto
display disappears and the
automatic mode is switched off. The
selected blower speed is shown in the
display.Adjusting automatically
Press the U button.
The air volume is adjusted automatical-
ly.
Defrosting
Activating
Press buttonP.
The indicator lamp on the button
comes on.
or
Switch off air recirculation, if selected.
Press buttonO.
The indicator lamp on the button goes
out.iThese settings should only be selected
for a short time.
Page 185 of 442
185 Controls in detail
Automatic climate control*
Item
1
Automatic climate control panel
2
Thumbwheel for air volume control
for left center air vent
3
Left center air vent, adjustable
4
Air vent, fixed
5
Right center air vent, adjustable
6
Thumbwheel for air volume control
for right center air vent
7
Thumbwheel for air volume control
for adding cold air
8
Thumbwheel for air volume control
for side air vent
9
Side defroster vent, fixed
a
Side air vent, adjustable
Item
1
Thumbwheel for air volume control
for side air vent
2
Side air vent, adjustable
Item
1
Left rear center air vent, adjustable
2
Right rear center air vent, adjust-
able
3
Air volume control for right rear
center air vent
4
Temperature rocker switch, right
5
Display
6
Temperature rocker switch, left
7
Air volume control for left rear cen-
ter air vent
Page 186 of 442
186 Controls in detailAutomatic climate control*
Item
1
Air distribution, left
2
Defrosting
3
Temperature rocker switch, left
4
Display
5
Temperature rocker switch, right
6
Rear window defroster
Item
7
Air distribution, right
8
Air distribution and air volume, right
(automatic, manual)
9
Activated charcoal filter
a
Rear air-conditioning remote con-
trol
b
Increase air volume
Item
c
Automatic climate control on / off
d
Decrease air volume
e
AC cooling on / off (AC
OFF
)
Residual heat / ventilation (REST)
f
Air recirculation
g
Air distribution and air volume, left
(automatic, manual)
Page 190 of 442

190 Controls in detailAutomatic climate control*Adjusting air volume
Adjusting manually
Nine blower speeds are available.
Press to decrease or Q to in-
crease air volume to the desired level.
The
Auto
display disappears and the
automatic mode is switched off. The
selected blower speed is shown in the
display.
Adjusting automatically
Press left or right U button.
The air volume is adjusted automatical-
ly.
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.
This provides the fastest possible cooling
of the vehicle interior (when windows and
sliding / pop-up roof* or panorama
sliding / pop-up roof* are closed).DefrostingActivating
Press buttonP.
The indicator lamp on the button
comes on.
or
Switch off air recirculation, if selected.
Press buttonO.
The indicator lamp on the button goes
out.
Close center air vents.
Adjust side air vents upwards.
Deactivating
Press buttonP.
The indicator lamp on the button goes
out. Defrosting is turned off.
iThese settings should only be selected
for a short time.
Page 193 of 442

193 Controls in detail
Automatic climate control*
Deactivating
Press buttone.
The indicator lamp on the button goes
out.
The system switches automatically to the
air recirculation mode if the carbon
monoxide (CO) or nitrogen oxide (NO
X)
concentration of the outside air increases
beyond a predetermined level.
The automatic air recirculation mode does
not function if AC
OFF
mode is selected or if
the outside temperature has fallen below
41
°F(5
°C). The activated charcoal filter should be
switched off when windows fog up on the
inside, or if the passenger compartment
needs to be quickly heated or cooled
down.
Deactivating the climate control sys-
tem
Deactivating
It is possible to deactivate the automatic
climate control system.
Press buttonM until the display is
cleared.
The climate control system is deacti-
vated.Reactivating
Press buttonM again.
iIf you keep buttone pressed, the
side windows and the sliding / pop-up
roof* will return to their previous posi-
tion.
iWith the climate control system deacti-
vated, the air flow and circulation are
switched off.
Only choose this setting temporarily to
prevent the windows from fogging up.
Page 195 of 442

195 Controls in detail
Automatic climate control*
The residual heat is automatically turned
off
when the ignition is switched on
after about 30 minutes
if the battery voltage drops
Rear air conditioning
1Left rear center air vent, adjustable
2Right rear center air vent, adjustable
3Thumbwheel for air volume control for
right rear center air vent
4Temperature rocker switch, right
5Display
6Temperature rocker switch, left
7Thumbwheel for air volume control for
left rear center air vent
Display1Temperature, left
2Temperature, right
Basic settings
We recommend setting the temperature
on both the left- and right-hand sides to
72°F. This ensures a pleasant temperature
in the rear of the vehicle.
The temperatures for the left- and
right-hand sides can be set using tempera-
ture rocker switches4 and6.
iHow long the system will provide heat-
ing depends on the coolant tempera-
ture and the temperature set by the
operator. The blower will run at speed
setting 1 regardless of the air distribu-
tion control setting.
Page 196 of 442
196 Controls in detailAutomatic climate control*Adjusting the rear settings with the
front control panelDisplay
Press the™ button (
page 186).
The display switches over.The temperature for the rear left- and
right-hand sides of the vehicle can be set
with temperature rocker switches3
and5.
The temperature display disappears ap-
proximately five seconds after the last
SmartKey confirmation and switches back
to the normal display.
iThe rear air conditioning will not cool
the air when AC
OFF
mode has been se-
lected in the front control panel.
iThe normal display will appear when
the™ button is pressed again.
Page 216 of 442
216 Controls in detailDriving systemsDistronic displays in the speedometer
dial
1Set speed
If Distronic is activated, one or two seg-
ments come on around the set speed.1Segments
If Distronic detects a vehicle directly
ahead, the segments from the speed of the
vehicle ahead to the set speed come on.
If Distronic calculates that there is a dan-
ger of collision:
The DTR warning lampl in the in-
strument cluster comes on red.
An intermittent warning sounds.
Immediately brake the vehicle to avoid
a collision.Under no circumstances should the
driver await the intermittent warning
sound before braking. See the fallow-
ing warning note.
The intermittent warning sound ceases
and the red DTR warning lampl
goes out when the necessary distance
to the vehicle ahead is again estab-
lished.
iThe vehicle speed displayed on the
speedometer can briefly vary from the
speed setting on the Distronic system.