In March 1969, the news that Daimler-Benz was developing a Wankel rotary-engine sports car hit like a bomb. Six months later, the C 111 was the star of the Frankfurt International Motor Show. Despite tremendous interest, Mercedes never put the vehicle into production. Various C 111s appeared over the next decade, featuring different engines, tweaked aerodynamics, and other modern developments.  Based on unprecedented access to the Mercedes-Benz Group Archives, this is a comprehensive history of the C 111 program. • Includes 1,100 photos and diagrams in 520 pages • Features previously unpublished interviews with the people behind the car. • Documents the Vision One-Eleven show car inspired by the C 111 and unveiled in June 2023.    This authoritative history was made possible through the support of Mercedes-Benz Classic, which granted access to the Mercedes-Benz Group Archives, the C 111 cars in the company's collection, and contemporary witnesses who formed the development in the 1960s and 1970s.