2009 Lexus ES 350 Navigation Manual - Page 246

AIR CONDITIONING Turning off the air conditioning manually will cancel the EXHAUST GAS AUTOMATIC mode. If you select the "AUTO" mode during fan operating, the air conditioning turns on and the EXHAUST GAS AUTOMATIC mode will operate. For normal use, it is best to keep the air intake control button set to OUTSIDE AIR mode. If recirculated air is used during heating, the windows will fog up more easily. To change the sensitivity of the sensor switching between the RECIRCULATED AIR and OUTSIDE AIR in the AUTOMATIC mode, push the air intake control button and hold it for a few seconds. The "Smog Sensor" screen will be displayed. The sensitivity of the sensor can be adjusted only while the vehicle has been stopped. The sensitivity of the touch−screen button is set to be higher toward "HI" and lower toward "LO". Touch the desired button on the screen. When you push the "AUTO" button, the above screen goes off. 266