2013 Lexus RX 350 Owners Manual - Page 401

3-2. Using the air conditioning system and defogger Rear window defogger switch Defoggers are used to defog the rear window, and to remove raindrops, dew and frost from the outside rear view mirrors. Vehicles with a navigation system Owners of models equipped with a navigation system should refer to the "Navigation System Owner's Manual". Vehicles with the Lexus Display Audio system Turns the rear window and outside rear view mirror defoggers on/off The defoggers will automatically turn off after 15 to 60 minutes. The operation time changes according to the ambient temperature and vehicle speed. Vehicles without a navigation system or the Lexus Display Audio system Turns the rear window and outside rear view mirror defoggers on/off The defoggers will automatically turn off after 15 to 60 minutes. The operation time changes according to the ambient temperature and vehicle speed. 430