DS is a premium automobile marque, founded and developed from French manufacturer Citroen. Automobile "marque" DeSoto was a longtime major sponsor. It was used by every domestic GM automobile marque except for GMC and Saturn. In 1998 Volkswagen AG bought the Bentley marque and the factory. President Madison issued 500 letters of marque authorizing privateers. Scania then became the ninth marque in the Volkswagen Group. The 16C Galibier was unveiled during Celebration of the Centenary of the Marque in Molsheim. Chrysler Canada marketed the Valiant at Dodge and Plymouth dealers under a standalone "Valiant" marque. Chinese manufacturer Hongqi was launched in 1958, making it the oldest Chinese luxury car marque. MG Motor designs, develops and markets cars sold under the MG marque. Road cars under the same marque soon followed. Sloan created LaSalle as a companion marque for Cadillac. They were chosen for their previous experience in Le Mans Prototype racing for the marque. Production was discontinued in 1994, when Peugeot finally discarded the Talbot marque. It was decided to fold the LaSalle into the more prestigious Cadillac marque.