cars touring bmw etcc other races pits 1973 belgium francorchamps spa pitstop 1974 1972 germany nuerburgring france paul castellet le ricard hans joachim stuck brno czechoslovakia mechanics blur speed two austria braungart many martin peterson prototype ronnie salzburg sports amon chris hi res zoom a4 hezemans jump lights technical toine track jochen lauda neerpasch niki rear refuel a3 abrasion detail dieter drivers electronics engine engineers fighting front gerold girls ickx jacky pankl quester rain riccard safety start tyre tytres women