2004 Mercedes CLK-Class Owner's Manual - Page 179

Controls in detail Automatic climate control Deactivating Press button , ( page 173). The indicator lamp on the button goes out. i The air recirculation mode is deactivated automatically: after five minutes if the outside temperature is below approximately 41°F (5°C) after five minutes if the air conditioning is turned off after 30 minutes if the outside temperature 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. Charcoal filter An activated charcoal filter markedly reduces bad odors and removes pollutants from air entering the passenger compartment. Activating Press button e ( page 173). The indicator lamp on the button comes on. i If you keep button , pressed, the side windows and the sliding/pop-up roof* will return to their previous position. i If you keep button e pressed, the side windows and the sliding/pop-up roof* will close. 179