2010 Lexus RX 450h Owners Manual - Page 276

AIR CONDITIONING D Switching between outside air and recirculated air modes (d) Defogging the windshield Push the air intake control button. The mode switches between outside air mode (the indicator is off), "AUTO" mode and recirculated air mode (the indicator is on) each time the button is pushed. The air conditioning system operates automatically. Recirculated air mode will automatically switch to outside air mode. It is not possible to return to recirculated air mode when the switch is on. CAUTION To prevent the windshield from fogging up Do not use the windshield air flow button during cool air operation in extremely humid weather. The difference between the temperature of the outside air and that of the windshield can cause the outer surface of the windshield to fog up, blocking your vision. 304