1993 Buick Riviera Owner's Manual - Page 100

-HeadlightsReminder Light (Canada Only) Your DRL work with a light sensor on of the top instrument panel. Don't cover it up. The low beam headlights will come at reduced on brightness in daylight when: The ignition is on. The headlight switch is off, and The transaxle is not in "P" (Park). At dusk, if the Twilight Sentinel feature is turned the on, exterior lights will come on automatically and the low beams will change tofull brightness. At dawn, the go exterior lights will out and the low beams will change to the reduced brightness DRL (if the of is headlight switch isoff). If the Twilight Sentinel off, at dusk a "HEADLIGHTS SUGGESTED" message will appear on the instrument panelto remind you to turn. on the headlights. Of course, you may still turn on the headlights any time . you to. need To idle your vehicle with the DRL off, shift the transaxle into T" (Park). The DRL will stay off until you shift out "P".(Park). of If your vehicle wasfirst sold, when new, in Canada, this light willgo on at night to remind you to turn the on headlights. Daytime Running Lights (Canada Only) The Canadian Federal Government has decided that "Daytime Running Lights" (DRL) a useful feature, are in that DRL can make your vehicle more visible to pedestrians and other drivers during daylight hours. DRL are required on new vehicles sold in Canada. 98