Why Mercedes-Benz Abandoned the C111

The Mercedes-Benz C111 looked like it came from the future—and Mercedes-Benz nearly turned it into a production sports car. A warm welcome to Ryan, who joined the Petersen Automotive Museum as an intern over the summer and is stepping in front of the camera for this Petersen Deep Dive! In this Deep Dive, Ryan takes a closer look at the C111-1 prototype and the experimental program behind one of Mercedes-Benz’s most fascinating cars. From its three-rotor Wankel engine and gullwing doors to its fiberglass body, advanced suspension, and extensive wind-tunnel testing, the C111 was designed as a rolling laboratory for the sports car of the future. But Mercedes-Benz didn’t stop there. The C111 evolved through multiple powertrains, including a four-rotor Wankel, a turbocharged diesel, and eventually a 4.5-liter V8. Along the way, the C111 program set a series of endurance and speed records at the Nardò Ring—including a 250-mph run that stood for years. So why didn't Mercedes-Benz ever put the C111 into production? Ryan breaks down the technology, engineering experiments, record-setting runs, and ultimately the challenges that kept this orange wedge from becoming the successor to the legendary 300 SL. See the Mercedes-Benz C111-1 and more iconic cars in "World-Class: 100 Years of Mercedes-Benz" at the Petersen Automotive Museum, supported by @sonaxusa & @rmsothebys And one question remains: if Mercedes-Benz had offered you an allocation in the 1970s, would you have written the check? CHAPTERS: 00:00 - Introduction 01:04 - the Frankfurt Auto Show 01:32 - the Wankle rotary engine 02:04 - Styling 02:53 - Public reception 03:25 - The Wankle engine and reliability issues 05:29 - Emissions troubles and engines swaps 06:00 - Endurance and speed records 07:17 - Final thoughts #PetersenMuseum #MercedesBenz #C111 #AutomotiveHistory #CarCulture