Accomplished racing driver who came out of retirement briefly in 1934 to act as a reserve driver for the works Auto Union team.
Started competing in hillclimbs in the early 1920s. Nicknamed Bubi (the kid) by his fellow racers he then raced a number of different cars before retiring in 1929. In 1934 he came out of retirement briefly to act as a reserve driver for the works Auto Union team. He came third at Avus on the debut of the new car and later came second in the Swiss Grand Prix. He retired for good at the end of the year.
He raced a Mercedes in 1923, an NSU from 1924-25, a Steyr in 1926, Bugatti in 1927 and 1928 and a Mercedes-Benz SSK in 1929.