2013 Buick LaCrosse Owner Manual - Page 198

8-4 Climate Controls conditioner runs automatically to cool the air inside the vehicle or to dry the air needed to defog the windshield faster. For eAssist vehicles, an auto stop may occur if the climate control system determines the a/c compressor can be shut off and still maintain comfort levels with minimal windshield fogging. Eco # (Eco Air Conditioning, If Equipped): This setting balances fuel economy and air conditioning comfort. In warm weather conditions, auto stops may occur more frequently and the vehicle interior may be warmer as compared to the comfort air conditioning. The eco a/c setting allows higher humidity inside the vehicle and window fogging before the engine restarts. Pressing the 0 button during an auto stop will restart the engine to prevent window fogging. To reach comfort levels quickly during an auto stop, the engine will restart if the air conditioner is off and the AUTO, eco # , or A/C is selected. The engine also restarts if the O is pressed on and the system is set to AUTO, eco # , or A/C. If temperature controls are adjusted cooler by more than 1°C (1°F) during an auto stop, the engine will restart to ensure that comfort is reached. 0 (Defrost): Clears the windshield of fog or frost more quickly. Air is directed to the windshield. For best results, clear all snow and ice from the windshield before defrosting. For eAssist vehicles that have the auto defog feature, auto stops can occur in defrost mode. In this mode, the auto stops are shorter and less frequent than other air delivery modes to prevent instant fogging. A/C (Comfort Air Conditioning): Press to turn the air conditioning system on or off. If the climate control system is turned off or the outside temperature falls below freezing, the air conditioner will not run. Pressing this button cancels automatic air conditioning and turns off the air conditioner. Press AUTO to return to automatic operation and the air conditioner runs automatically as needed. When the indicator light is on, the air @ (Recirculation/Auto Recirculation): Press to change to automatic control of air recirculation inside the vehicle. When the auto recirculation indicator light is on, the air is automatically recirculated as needed to help quickly cool the air inside the vehicle. In auto recirculation control, the Air Quality Control system may operate when pollution is detected. To adjust the sensitivity of the Air Quality Control, see "Climate and Air Quality" under Vehicle Personalization on page 5‑39.