2006 Mercedes CLK-Class Owner's Manual - Page 193

Controls in detail Climate control (CLK 350) Windshield fogged on the outside Air recirculation mode Switch to air recirculation mode to prevent unpleasant odors from entering the vehicle from the outside (e.g. before driving through a tunnel). This setting cuts off the intake of outside air and recirculates the air in the passenger compartment. Warning! Activating Press button , ( page 187). The indicator lamp on the button comes on. i Keep this setting selected only until the windshield is clear again. Switch the windshield wipers on ( page 54). Press button U ( page 187). The indicator lamp on the button comes on. Air distribution and air volume are adjusted automatically. If the automatic mode of the climate control is switched off: Turn air distribution control 4 to a or Y ( page 187). i The air recirculation mode is activated automatically at high outside temperatures. The indicator lamp on button , is not lit when the air recirculation mode is automatically switched on. A quantity of outside air is added after approximately 30 minutes. G Fogged windows impair visibility, endangering you and others. If the windows begin to fog on the inside, switching off the air recirculation mode immediately should clear interior window fogging. If interior window fogging persists, make sure the air conditioning ( page 194) is activated, or press button P or 0. 192