The accident is established as taking place in the French Alps. Marcia Richmond is driving a Mercedes-Benz that has New York plates, but with the steering wheel on the right. There does not seem to be any natural explanation for an American woman to be driving a European-style car that was registered in America but has the steering wheel on the wrong side. It may reveal that the location shooting actually took place in England, where the cars are right-hand drive; the props department didn't have a French number plate to hand, but they did have a New York plate.