2013 Buick LaCrosse Owner Manual - Page 199

Climate Controls When the indicator light is on, air is recirculated inside the vehicle. If the indicator light is off, outside air will flow into the vehicle. Press AUTO or @ to return to automatic operation. Auto Defog: The climate control system may have a sensor to automatically detect high humidity inside the vehicle. When high humidity is detected, the climate control system may adjust to outside air supply and turn on the air conditioner. The fan speed may slightly increase to help prevent fogging. If the climate control system does not detect possible window fogging, it returns to normal operation. For eAssist vehicles, there may be shorter and less frequent auto stops when auto defog is in use. To turn Auto Defog off or on, see "Climate and Air Quality" under Vehicle Personalization on page 5‑39. 8-5 Rear Window Defogger = (Rear Window Defogger): Press to turn the rear window defogger on or off. The rear window defogger turns off automatically after about 10 minutes. If turned on again it runs for about five minutes before turning off. The defogger can also be turned off by turning the ignition to ACC/ACCESSORY or LOCK/OFF. The rear window defogger can be set to automatic operation. See "Climate and Air Quality" under Vehicle Personalization on page 5‑39. When auto rear defog is selected, the rear window defogger turns on automatically when the interior temperature is cold and the outside temperature is about 4°C (40°F) and below. The auto rear defogger turns off automatically after about 10 minutes, or after five minutes if the outside temperature is not as cold. For eAssist vehicles, auto rear defog will only run during a remote start and the feature is not available in the Vehicle Personalization menu. For vehicles with heated outside rearview mirrors, they turn on when the rear window defogger button is on and help to clear fog or frost from the surface of the mirror. See Heated Mirrors on page 2‑16. Notice: Do not try to clear frost or other material from the inside of the front windshield and rear window with a razor blade or anything else that is sharp. This may damage the rear window defogger grid and affect the radio's ability to pick up stations clearly. The repairs would not be covered by the vehicle warranty. ( (Heated Steering Wheel): For vehicles with this feature, press to turn on or off. See Heated Steering Wheel on page 5‑3.