Mercedes-Benz S-Class 2011 Operator's Manual page 295

This is the quickest way to cool the vehicle
interior when the sliding sunroof and the side
windows are closed.
Defrosting the windows
Windows fogged up on the inside
X
Activate the "cooling with air
dehumidification" function via COMAND
Y
( page 263).
X
Activate automatic mode Ã.
X
If the windows continue to fog up, activate
the defrosting function (
i You should only select this setting until
the windshield is clear again.
Windows fogged up on the outside
X
Activate the windshield wipers.
X
Activate automatic climate control.
i You should only select this setting until
the windshield is clear again.
Rear window defroster
Activating/deactivating
G
Warning
Any accumulation of snow and ice should be
removed from the rear window before driving.
Visibility could otherwise be impaired,
endangering you and others.
The rear window heating has a high current
draw. You should therefore switch it off as
soon as the window is clear as it only switches
off automatically after several minutes.
If the battery voltage is too low, the rear
window heating may switch off.
X
Turn the SmartKey to position 2 in the
ignition lock.
X
Press the ¤ rocker switch up or down.
The indicator lamp in the ¤ rocker
switch lights up or goes out.
Operating the climate control systems
Y
page 292).
Problems with the rear window heating
The rear window heating has deactivated
itself prematurely or cannot be activated.
X
Switch off any consumers that are not
required, e.g. reading lamps or interior
lighting.
When the battery is sufficiently charged,
the rear window heating is activated again
automatically.
Activating/deactivating air-
recirculation mode
You can deactivate the flow of fresh air if
unpleasant odors are entering the vehicle
from outside. The air already inside the
vehicle will then be recirculated.
G
Warning
Fogged windows impair visibility,
endangering 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 is activated, or press the ¬
button.
X
Turn the SmartKey to position 2 in the
ignition lock.
X
To activate: press the g rocker switch
up or down.
The indicator lamp in the g rocker
switch lights up.
i Air-recirculation mode is activated
automatically at high outside
temperatures. The indicator lamp in the
g rocker switch is not lit when
automatic air-recirculation mode is
activated.
Outside air is added after about 30
minutes.
293
Z