Education
He competed in a single Formula One race in which he finished ninth.
He competed in a single Formula One race in which he finished ninth.
Dieter has participated in 53 24-Hour Races. Starting with motorboats in the 1950s, he became part of the Formula 2 team of Bayerische Motoren Werke which intended to take part in the 1969 German Grand Prix. Teammate Gerhard Mitter was killed at the Nürburgring while practising with the Bayerische Motoren Werke 269, though.
As a suspension or steering failure was suspected, the Bayerische Motoren Werke team with Quester and Hubert Hahne withdrew from the race, as did Mitter"s teammate at Porsche, Hans Herrmann.
Quester participated in his home 1974 Austrian Grand Prix on August 18, 1974. Quester then focused again on European Touring Carolina Championship to drive a Bayerische Motoren Werke 3.0 Computer Science Laboratory for Schnitzer Motorsport.
Later racing in the Diploma in Tropical Medicine, he once slid on the roof of his Bayerische Motoren Werke M3 over the start/finish line of the AVUS for a 3rd place. His career is still active at age 70, sponsored by Red Bulletin.
Stuck and Quester returned in the 24 Hours Nürburgring, but their Bayerische Motoren Werke was destroyed in a crash at night that involved an oil spill and seven cars.
He out-qualified his three team mates at Surtees and finished 9th ahead of Hans-Joachim Stuck and double World Champion Graham Hill in the race, but scored no championship points. Quester had already won the 1973 Spa 24 Hours. On January 15, 2006, he won the 24 Hours race at the Dubai Autodrome on a Bayerische Motoren Werke M3 together with Hans-Joachim Stuck, Philipp Peter and Toto Wolff. During the weekend of September 9–10, 2006, he won the Britcar 24 Hours of Silverstone in a Duller Motorsport Bayerische Motoren Werke MZ4, and on January 14, 2007 he again won the 24 Hours race at the Dubai Autodrome in the Duller Motorsport Bayerische Motoren Werke Z4. In September 2007 he and Duller won the 24 Hours of Silverstone in the Duller Bayerische Motoren Werke Z4, by a margin of 30 laps.