Mercedes-AMG GmbH, commonly known as AMG, is the high performance division of Mercedes-Benz. AMG independently engineers, manufactures and customizes Mercedes Benz AMG vehicles. Mercedes-AMG is headquartered in Affalterbach, Baden-Würtemberg, Germany. AMG was originally an independent engineering firm specializing in performance improvements for Mercedes vehicles; Daimler-Benz AG 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.