The 1941 Clipper was the widest production car in the industry and the first to be wider than it was tall—a foot wider to be exact. The body from cowl to deck was a single piece of steel—largest in the industry, and the floor pan had only one welded seam from end to end. Single pieces of sheet metal comprised the rear quarters and hood. The hood could be lifted from either side of the car or removed entirely by throwing two levers. Instead of the traditional third side window, ventipanes were incorporated in the rear doors, providing controllable flow-through ventilation. The battery made its first move from under the seat to under the hood, where it stayed warmer and was more accessible. There was a "Ventalarm" whistle to warn when the tank was within a gallon of being full, and an accelerator-activated starter button, so the act of starting simultaneously set the automatic choke. Reithard's beautiful symmetrical dashboard contained a full ration of instruments, including an electric oil pressure gauge adapted from the One Sixty. Options included Packard's "Electro-Matic" vacuum-operated clutch, which let the driver ignore the clutch pedal in ordinary driving; "Aerodrive" (overdrive); an effective auxiliary under-seat heater, leather upholstery, fender skirts, and, for $275, air conditioning—a Packard first, introduced on all eight-cylinder 1940 models.