I brought a headlight-warning buzzer to share at the Northern Virginia Gathering but it didn't get shared very far. It is a very simple item that can be purchased from most GM dealerships. The package says "Headlight Warning Package" part number 1#999373 and costs about $15. The little buzzer has two wires, one connected to a dash light and the second connected to a key switched circuit. I connected mine to the light in the clock and the other to the heater blower switch. I now get a nice BUZZ if I turn my ignition off when my lights are on.
Jim Villers
190SL, 230SL 5-Speed, 190E 2.3-16 Kompressor