Dieter Quester began in 1957 with motor boat races, in 1962 he won the European Championship in the 500 cc class racing boat ( outboard motor). From 1963 to 1965 he tried to Norton, NSU and BMW motorcycle racing, but without outstanding successes.
In 1965 he moved to the automotive racing. He became European Champion for touring cars in 1968 and 1969 BMW 2002 ti 1977 on a BMW 3.5 CLS by Alpina and 1983 BMW 635 CSi in the woodcarving team.
From 1968 he was a factory driver for BMW and one of the early instructors of the BMW driver training. In 1969, he should first start in a Formula 2 race at the Nürburgring, but after the fatal training accident of his racing colleagues Gerhard Mitter BMW pulled back participation. After several Formula 2 victories followed at BMW, in the overall standings, he was third in the 1971 year.
Questers only participation in Formula 1 race, the GP of Austria on 18 August 1974 for the Team Surtees ( Surtees TS9 on ) produced from starting position 25 9th place in the standings.
In the 1970s and 1980s was followed by other touring car and Procar races, including a class win at Le Mans in 1989 and participation in the German Touring Car Championship.
From 1994 to 1999 Quester was active in the American racing series, IMSA, ALMS and the U.S. Sportscars Championship. 2001 and 2002, he launched a Porsche 911 GT3 -R at Daytona and Sebring and took part in the FIA GT Championship. He drove the time being last race on January 15, 2006 in the 24- hour race in Dubai on a privately entered BMW M3 GTR by Duller Motorsport. He won the race together with Hans -Joachim Stuck, Philipp Peter and Toto Wolff.
In a race of the German Touring Car Championship in 1990 Dieter Quester crossed on the AVUS the finish line on the roof sliding, what is still enough for third place.