On the old and very long Nürburgring, Formula Two cars occasionally had their own race alongside the Formula One cars in the same events to fill the field, which provided other drivers like Kurt Ahrens, Jr., Gerhard Mitter and Dieter Quester the opportunity to enter the German Grand Prix. As the Formula Two section was counted separately, the drivers could not score World Championship points. Hahne participated in the 1966 and 1969 German Grands Prix in the special Formula Two sections of those events, but withdrew before the start of the 1969 event due to the fatal accident suffered by his team-mate Gerhard Mitter.