The gem that never made it, the 1969 Mercedes C111
In the late 1960′s and early 1970′s, Mercedes was experimenting with new engine types. Specifically they wanted to test diesel engines, Wankel engines, and turbochargers. The C111 allowed them to do just that. They fitted it with a 350hp, four rotor Wankel engine which could easily reach 180mph, and go from 0-60 in 4.8 seconds. This also coincided with the oil crisis in the 1973, so the high-emission and gas-guzzling C111 never made it into production.