August Horch founded A. Horch & C in 1899 in Germany. He later founded August Horch Motorwagenwerke AG which became Audi in 1909 after he left. Audi merged with other German car companies DKW, Horch, and Wanderer to form Auto Union AG in 1932. Auto Union AG chose the four interlocking ring logo to represent the four car companies. Audi's slogan "Vorsprung durch Technik" translates to "Advancement through Technology" and emphasizes Audi's focus on engineering and innovation.