Chrysler introduced the third of the 300 letter-series model in 1957 as a personal luxury coupe and convertible.
To say about a Chrysler 300 C that is big is an understatement. It was huge! It was longer than most of the limousines from the 2000s yet. It was a 2-door convertible vehicle. It featured advanced systems for those times and an option for air-conditioning, which was not so common.

At the front, the dual round headlights and its trapezoidal grille were specific for the 300 C. Its slightly raked but curved windshield offered a panoramic view, suitable for a vehicle that was two-meters (78.8 in) wide. Unlike the Saratoga model, which was very similar to it, it featured a chromed line on the rear quarter panel and a round badge with the 300 C name on it. The 300 C showed sharp fins on top of the fenders and big, tall triangular taillights in the back.

Inside, it was a luxury vehicle, with room for up to six occupants on two benches. At the front, the 300 C was offered with bucket seats as well. A push-button start was unusual for those times, and that made it special. Its rag-top was completely retractable behind the rear bench, in a special compartment.

Under the hood, Chrysler installed a Hemi V8 engine available in two power options paired to a 3-speed automatic transmission. The high power output version was built in a very limited edition of just 18 units.