2005 Mercedes CLK-Class Owner's Manual - Page 202

Controls in detail Automatic climate control (CLK 500/CLK 55 AMG) Defrosting Deactivating Press button P or 0 ( page 195). The indicator lamp on the button goes out. Defrosting is turned off. The previous settings are once again in effect. Maximum cooling MAXCOOL If the left and right air distribution controls as well as the airflow volume control are set to U ( page 195) and there is a high need for cooling, the display "MAXCOOL" appears. This provides the fastest possible cooling of the vehicle interior (when side windows and tilt/sliding sunroof* are closed). i These settings should only be selected for a short time. Activating Press button P or 0 ( page 195). The indicator lamp on the button comes on. The air conditioning switches automatically to the following functions: maximum blowing and heating power air flows onto the windshield and the front side windows the air recirculation mode is switched off 200