Mercedes-Benz CL Operator's Manual page 269

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.
Turn the SmartKey to position 2 in the
X
ignition lock.
To activate: press the g rocker switch
X
up or down.
The indicator lamp in the g rocker
switch lights up.
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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.
To deactivate: press the g rocker
X
switch up or down.
The indicator lamp in the g rocker
switch goes out.
Operating the climate control systems
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Air-recirculation mode deactivates
automatically:
after approximately five minutes at
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outside temperatures below
approximately 41 ‡ (5 †)
after approximately five minutes if
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cooling with air dehumidification is
deactivated
after approximately 30 minutes at
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outside temperatures above
approximately 41 ‡ (5 †)
Activating/deactivating the residual
heat function
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.
Turn the SmartKey to position 0 in the
X
ignition lock or remove it.
To activate: press the Ì rocker switch
X
up or down.
The indicator lamp in the Ì rocker
switch lights up.
To deactivate: press the Ì rocker
X
switch up or down.
The indicator lamp in the Ì rocker
switch goes out.
i
Residual heat is deactivated
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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