Mercedes-AMG GmbH, commonly known as AMG, engineers, manufactures and customises Mercedes-Benz-branded vehicles. Mercedes-AMG is headquartered in Affalterbach, Baden-Württemberg, Germany. Originally an independent engineering firm specialising in performance improvements for Mercedes vehicles, DaimlerChrysler took a controlling interest in 1990, then became sole owner of AMG in 2005. Mercedes-AMG GmbH is now a wholly owned subsidiary of Daimler AG.