Schlesser participated in the 1966 German Grand Prix at the Nürburgring with a Formula Two (F2) specification Matra MS5-BRM 1.0 litre and again in 1967 at the same venue with an F2 Matra MS5-Cosworth 1.6 litre. In 1966, he finished 10th in the overall classification and third in the Formula Two classification. In 1967, he was forced to retire with a clutch problem after two laps.