Black plate (28,1)Cadillac DTS Owner Manual - 2011Cleaning the IntelliBeam Light SensorThe light sensor is locatedon the inside of thevehicle in front of theinside rearview mirror.Clean the light sensor window, periodically, using glasscleaner on a soft cloth. Gently wipe the sensor window.Do not spray glass cleaner directly on the surface of thesensor window.Wiper Activated HeadlampsThis feature activates the headlamps and parking lampsafter the windshield wipers are turned on and havecompleted eight wipe cycles within four minutes.When the ignition is turned to LOCK/OFF, thewiper-activated headlamps immediately turn off. Thewiper-activated headlamps also turn off if the windshieldwipers are turned off.Headlamps on ReminderA warning chime will sound if the exterior lamp controlis left on in either the headlamp or parking lamp positionand the driver's door is opened with the ignition off.Daytime Running Lamps (DRL)Daytime Running Lamps (DRL) can make it easier forothers to see the front of your vehicle during the day.Fully functional daytime running lamps are required onall vehicles first sold in Canada.The DRL system makes the turn signal lamps come onwhen the following conditions are met:. It is still daylight and the ignition is on.. The exterior lamp control is in the off position.. The transmission is not in P (Park) (UnitedStates only).. The light sensor is covered or not detecting light.See “Sensors” under Dual Climate Control Systemon page 4‑34.When DRL are on, no other exterior lamps such as theparking lamps, taillamps, etc. will be on when the DRLare being used. The instrument panel will not be lit upeither.When automatic lighting is on and it is dark enoughoutside, the turn signal lamps turn off and normallow-beam headlamp operation occurs.4-28