Mercedes-Benz of Chesterfield is an Authorized Mercedes-Benz Sales and Service Center located in O'Fallon, MO. As a new Mercedes-Benz dealership, our commitment to customer satisfaction is second to none. We use only Factory-Trained Mercedes-Benz Certified Technicians to work on your Mercedes-Benz. Did you know you can schedule your Mercedes-Benz Service online? We are open seven days a week for your convenience. We make it convenient to schedule your Mercedes-Benz repairs in O'Fallon.