Welcome to Auto City STL, home of the best used cars in St.Charles, Missouri. We have worked hard to build a reputation for selling high quality used cars backed by extraordinary service. Most of our business is done with individuals who've never even driven the vehicle or seen it in person prior to purchasing. Only two things make that possible: unequaled quality and a high level of service. We offer a variety of car financing programs to meet the individual needs of our customers and provide our customers with a variety of extended warranty plans to protect their used car after a purchase has been made.