Autos: Carnegie Hall on Wheels

The executives of the Ford Motor Co. have been driving around Detroit lately with an unusually rhapsodic look on their faces. The look is not the result of Ford's soaring sales—which were up 23% for the first quarter—but of a new auto accessory that Ford hopes will increase its sales even more. Board Chairman Henry Ford II has one in his Lincoln Continental; Vice President Lee Iacocca has one in his red Mustang. Using one on the way home makes Ford Division General Manager Donald Frey feel that he is "sitting in the middle of Carnegie Hall." The...