Mercedes-Benz S-Class 2011 Operator's Manual page 296

Setting the air vents
294
X
To deactivate: press the g rocker
switch up or down.
The indicator lamp in the g rocker
switch goes out.
Air-recirculation mode switches off
i
automatically:
after approximately five minutes if
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outside temperatures are under about
41 ‡ (5 †)
after approximately five minutes if
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cooling with air dehumidification is
deactivated
after approximately 30 minutes if outside
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temperatures are over about
41 ‡ (5 †)
Switching the residual heat on/off
It is possible to make use of the residual heat
of the engine to continue heating the
stationary vehicle for up to 30 minutes after
the engine has been switched off. The heating
time depends on the temperature that has
been set.
i The blower will run at a low speed
regardless of the airflow setting.
i If you activate the "residual heat" function
at high temperatures, only the ventilation
will be activated. The blower runs at
medium speed.
X
Turn the key to position 0 in the ignition
lock or remove it.
X
To switch on: press the Ì rocker
switch up or down.
The indicator lamp in the Ì rocker
switch lights up.
X
To switch off: press the Ì rocker
switch up or down.
The indicator lamp in the Ì rocker
switch goes out.
Residual heat is deactivated
i
automatically:
after about 30 minutes
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when the ignition is switched on
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if the battery voltage drops
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if the coolant temperature is too low
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Setting the air vents
Important safety notes
G
Warning
When operating the climate control, the air
that enters the passenger compartment
through the air vents can be very hot or very
cold (depending on the set temperature). This
could cause burns or frostbite to unprotected
skin in the immediate area of the air vents.
Always keep sufficient distance between
unprotected parts of the body and the air
vents. If necessary, use the air distribution
adjustment to direct the air to air vents in the
vehicle interior that are not in the immediate
area of unprotected skin.
In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes:
keep the air inlet grille on the hood free of
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blockages, such as ice, snow or leaves
never cover the vents or air inlet and outlet
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grilles in the vehicle interior.
i For virtually draft-free ventilation, adjust
the sliders of the air vents to the center
position.