The Audi 100 C1 (type F104 or as a coupe F105) is an upper middle-class passenger car from Auto Union GmbH (from 1969: Audi NSU Auto Union AG). The vehicle with a longitudinally installed four-cylinder in-line engine and front-wheel drive was built from October 1968 as a four-door sedan, the two-door version followed in October 1969. Production of the Audi 100 Coupé S presented in September 1969 began in July 1970.