2001 Mercedes CL-Class Owner's Manual - Page 175

Instruments and controls Operation Driving Instrument cluster display Practical hints Car care Technical data Index Automatic climate control Activated charcoal filter An activated charcoal filter markedly reduces bad odors and removes pollutants from air entering the passenger compartment. To select, press e button. The indicator lamp in the button illuminates. To cancel, press e button. The indicator lamp in the button goes out. 172 The system switches automatically to the air recirculation mode, if the carbon monoxide (CO) or nitrogen oxides (NOX) concentration of the outside air increases beyond a predetermined level. The automatic air recirculation mode does not function if economy mode S is selected or if the outside temperature has fallen below 40°F (5°C). The activated charcoal filter should be switched off when windows fog up on the inside, or if the passenger compartment needs to be quickly heated or cooled down.