Show and sell. BMW 4S store refers to sales, after-sales maintenance, and parts supply, which facilitates customers to view and purchase cars and display vehicles. The showroom is called the Auto City Showroom. It is a part of the 4S store. The showroom is only responsible for display and sales. You can only go to the 4S store for repairs and maintenance. BMW 4s is a dealer store authorized by BMW Motor Company, focusing on providing special sales, after-sales service and repair services of BMW series vehicles.