Used car dealer in Wethersfield, Springfield MA, Worcester MA, Torrington, CT | State Line Auto LLC State Line Auto LLC -(860) 372-4779 is a used car dealer in Wethersfield, Springfield MA, Worcester MA, Torrington, Connecticut selling used Acura, Audi, BMW, Buick, Chevrolet, Chrysler, Dodge, Ford, GMC, Honda, Infiniti, Jeep, Kia, Lexus, Mazda, Mercedes-Benz, Nissan, Ram, Rolls Royce, Suzuki, Toyota and Volkswagen