2007 Cadillac STS Owner's Manual - Page 218

Twilight Sentinel® Twilight Sentinel® can turn your lamps on and off for you. With Twilight Sentinel® the following will happen: • When it is dark enough outside, the front turn signal lamps (DRL) will go off, and the headlamps and parking lamps will come on. The other lamps that come on with headlamps will also come on. • When it is bright enough outside, the headlamps will go off, and the front turn signal lamps (DRL) will come on, as long as the exterior lamp switch is in the off position. If you start your vehicle in a dark garage, the automatic headlamp system will come on immediately. Once you leave the garage, it will take about one minute for the automatic headlamp system to change to DRL if it is light outside. During that delay, the instrument panel cluster might not be as bright as usual. Make sure the instrument panel brightness control is in full bright position. See Instrument Panel Brightness on page 220 for more information. You can idle the vehicle with the lamps off, even when it is dark outside. First set the parking brake while the ignition is in OFF/ACCESSORY. Then start the vehicle. The lamps will stay off until the parking brake is released. A light sensor on top of the instrument panel makes the Twilight Sentinel® work, so be sure it is not covered. 218