Mercedes Benz Fintail (German: Heckflosse) is a nickname given to certain Mercedes Benz vehicles which show American influences in design including the presence of tailfins. Though never officially designated as such (they were designated Peilstege, marking the end of the car in rear view mirror). The Fintail series replaced the Ponton series.
The exterior was designed for the European and North American markets. The body was modern and featured a characteristic tailfins that gave the models their nickname — the fintail (German: Heckflosse).
The W111 was a chassis code given to its top-range vehicles, including four-door sedans, produced from 1959 to 1968, and two-door coupes and cabriolets from 1961 to 1971. The W111, was initially attributed only to six-cylinder cars with 2.2-litre engines. The luxury version with big-block 3-litre engines were given the chassis code W112. The entry-level vehicles with four-cylinder engines were called W110. All three versions W110, W111, and W112, in both two- and four-door bodies, were built on an identical chassis.