His most successful year, however, is yet to come: In 1966, he wins another European Championship and, with a BMW 2000Ti, he masters the challenge of the “Green Hell” in 9:58.5 minutes, thus being the first touring car driver to lap the Nürburgring in less than ten minutes.
O seu ano máis exitoso aínda estaba por chegar: en 1966, gaña outro Campionato Europeo e, cun BMW 2000Ti, domina o desafío do "Inferno Verde" en 9:58.5 minutos, sendo o primeiro piloto de turismo en percorrer Nürburgring en menos de dez minutos.