Home » 1969 Mercedes-Benz C111 and 1970 C111-II: Wankel vs V8 Proved Piston-Engine Dominance » 1977 Mercedes-Benz C111-III Diesel 6 1977 Mercedes-Benz C111-III Diesel 6 Home » 1969 Mercedes-Benz C111 and 1970 C111-II: Wankel vs V8 Proved Piston-Engine Dominance » 1977 Mercedes-Benz C111-III Diesel 6