1996 Buick Century Owner's Manual - Page 121

Rear Window Defogger The rear window defogger uses a warming grid to remove fog from the rear window. In winter, it can also keep icefrom forming on the rear window. Ventilation System REAR ! Press the ON portion of the switch. The indicator light will glow. The rear window defogger will turn off automatically after about 10 minutes of use. You can also turn it off by turning off the ignition or pressing the OFF portion of the switch. I NOTICE: Don't use a razor blade or something else sharp on the insideof the rear window.If you do, you could cut or damage the warming grid, and the repairs wouldn't be covered your warranty. by Your Buick's flow-through ventilation system supplies outside air into the vehicle when it is moving. Outside air will also enter the vehicle when the heater or the air conditioning fan is running. For mild outside temperatures,when little heating or cooling is needed, slide the upper lever to VENT. Airflow is through the instrument panel outlets. Rotate the control next to the outlets to turn on, adjust or turn off the airflow. Adjust the lower lever on the control panel to the temperature desired. 3-3