2010 Cadillac CTS Owner's Manual - Page 179

Lighting 5-3 Daytime Running Lamps (DRL) Daytime Running Lamps (DRL) can make it easier for others to see the front of your vehicle during the day. Fully functional daytime running lamps are required on all vehicles first sold in Canada. The DRL system will make either the reduced intensity low-beam headlamps or dedicated DRL's come on when the following conditions are met: . When DRL's are on, only the reduced intensity low-beam headlamps or dedicated DRL's will be on. The other exterior lamps and the instrument panel cluster will not be on. When the exterior lamp control is in AUTO and it is dark enough outside, the DRL turns off and the low-beam headlamps will turn on. When it is bright enough outside, the low-beam headlamps will go off, and the DRL will turn back on. If the vehicle is started in a dark garage, the automatic headlamp system comes on immediately. Once the vehicle leaves the garage, it takes about one minute for the automatic headlamp system to change to DRL if it is light outside. During that delay, the instrument panel cluster may not be as bright as usual. Make sure the instrument panel brightness lever is in the full bright position. See Instrument Panel Illumination Control on page 5‑5. Turning the exterior lamp control to off or to the low-beam headlamp position will turn off the DRL. If the parking lamps or the fog lamps were turned on instead, the DRL will still turn off. This will work regardless of gear position and whether or not the parking brake is set. It is still daylight and the ignition is in ON/RUN or START. The exterior lamp control is in off or AUTO and the headlamps are off. The automatic transmission is not in P (Park). . .