2013 Lexus ES 350 Owners Manual - Page 208

4-3. Operating the lights and wipers ● In the situations below, the system may not be able to correctly detect the sur- rounding brightness levels, and may flash or expose nearby pedestrians to the high beam. Therefore, you should consider turning the high beams on or off manually rather than relying on the Automatic High Beam system In bad weather (rain, snow, fog, sandstorms etc.) The windshield is obscured by fog, mist, ice, dirt etc. The windshield is cracked or damaged. The camera sensor is deformed or dirty. Surrounding brightness levels are equal to those of headlights, tail lights or fog lights. Vehicles ahead have headlights or tail lights that are either switched off, dirty, are changing color, or are not aimed properly. When driving through an area of intermittently changing brightness and darkness. When frequently and repeatedly driving ascending/descending roads, or roads with rough, bumpy or uneven surfaces (such as stone-paved roads, gravel tracks etc.). When frequently and repeatedly taking curves or driving on a winding road. There is a highly reflective object ahead of the vehicle, such as a sign or a mirror. The vehicle's headlights are damaged or dirty, or are not aimed properly. The vehicle is listing or titling, due to a flat tire, a trailer being towed etc. The driver believes that the high beam may be causing problems or distress to other drivers or pedestrians nearby.