Mercedes-Benz SL 500 Operator's Manual page 177

Controls in detail
Automatic climate control
i
If you keep button , pressed, the
side windows will close.
The air recirculation mode is activated
automatically
at high outside temperatures
if the concentration of carbon mon-
oxide and nitrogen oxide in the out-
side air increases, for example in a
tunnel
If you have turned off the air condition-
er ( page 179) or the outside
temperature is below 41°F (5°C), the
air recirculation mode will not switch
on automatically.
176
Deactivating
Press button , ( page 171).
The indicator lamp on the button goes
out.
i
If you keep button , pressed, the
side windows will return to their previ-
ous position.
The air recirculation mode is deactivated
automatically
after five minutes if the outside temper-
ature is below approximately 41°F
(5°C)
after five minutes if the air conditioner
is turned off
after 30 minutes if the outside temper-
ature is above approximately 41°F
(5°C)
At outside temperatures above 79°F
(26°C) the system will not automatically
switch back to outside air. A quantity of
outside air is added after approximately
30 minutes.