After seeing one of their neighbors drive home a new car, the Arnold's family station wagon just isn't reliable anymore, so they decide to get a new car. They go to a car dealer and select a new cherry red '69 Ford Mustang convertible and is ready to seal the deal. But Jack has trouble letting go of their old car as well as being reluctant to spend his money on a new one. Guest Starring: Patrick Cronin as used car salesman Marvin Lutz.