2010 Buick LaCrosse Owner's Manual - Page 139

Lighting When the DRL are on, the low-beam headlamps will be on. The taillamps, sidemarker, instrument panel lights and other lamps will not be on. The DRL turn off when the headlamps are turned to O or the ignition is off. When it is bright enough outside the headlamps will turn off or may change to daytime running lamps (DRL). The automatic headlamp system turns off when the exterior lamp control is turned to O or the ignition is off. 5-3 AFL is not immediately operable after starting the vehicle; driving a short distance is required to calibrate the AFL. See Exterior Lamp Controls on page 5‑1. Hazard Warning Flashers | Hazard Warning Flasher: Press this button located on the instrument panel below the climate control system, to make the front and rear turn signal lamps flash on and off. Press again to turn the flashers off. The hazard warning flashers turn on automatically if the airbags deploy. Automatic Headlamp System When the exterior lamp control is set to AUTO and it is dark enough outside, the headlamps come on automatically. There is a light sensor located on top of the instrument panel. Do not cover the sensor or the headlamps will come on when they are not needed. The system may also turn on the headlamps when driving through a parking garage or tunnel. Adaptive Forward Lighting (AFL) The Adaptive Forward Lighting System (AFL) pivots the headlamps horizontally to provide greater road illumination while turning. To enable AFL, set the exterior lamp switch to the AUTO position. Moving the switch out of the AUTO position deactivates the system. AFL operates when the vehicle speed is greater than 3 km/h (2 mph). AFL does not operate when the transmission is in R (Reverse).