Charcoal Filter - Mercedes-Benz 2003 C 240 4MATIC Operator's Manual

i
If you keep button O pressed, the
side windows and the sliding/pop-up
roof* will be closed.
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
Please note that the charcoal filter
must be activated (see below) for
the air recirculation mode to be
activated automatically.
If you have turned off the air condition-
ing ( page 163) or the outside
temperature is below 41°F (5°C), the
air recirculation mode will not switch
on automatically.
Deactivating
Press button O .
The indicator lamp on the button goes
out.
i
If you keep button O pressed the
side windows and the sliding/pop-up
roof* will be returned to their previous
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 conditioning
is turned off
after 30 minutes if the outside temper-
ature is above approximately 41°F
(5°C)
Controls in detail
Automatic climate control*
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.

Charcoal filter

An activated charcoal filter markedly re-
duces bad odors and removes pollutants
from air entering the passenger compart-
ment.
Activating
Press button e .
The indicator lamp on the button lights
up.
The system switches automatically to the
air recirculation mode if the carbon
monoxide (CO) or nitrogen oxide (NO
concentration of the outside air increases
beyond a predetermined level.
)
X
161