1951 Mercedes-Benz 220
Despite their tradition as a manufacturer of luxury cars, after the end of the war Mercedes-Benz produced only four cylinder engined passenger cars until 1951. The Mercedes-Benz 220 and the more powerful Mercedes-Benz 300, introduced at the same time, were the first post-war Mercedes-Benz models to feature six cylinder engines.
The styling was similar to that of the Mercedes-Benz 170S except that the 170's freestanding headlights were for the 220 integrated into the fenders for a slightly more modern look. Two different cabriolet models were built, conceived as exclusive sporting cars of exclusive character, but these only sold 1,278 and 997 for the "A" (two-door, two-seat) and "B" (two-door, four-seat) versions, respectively.
In December 1953, just as the saloon and cabriolet "B" models were about to be replaced, a "Cabriolet A" derived W187 Coupe was announced for 1954. The Mercedes-Benz sales department let it be known that this development was a direct response to pressing requests from leading celebrities of the time. During 1953 the manufacturer replaced the conventionally flat windscreen on the 2/3 seater "Cabriolet A" with a slightly curved screen, which also found its way on to the new coupe: this was a way of highlighting the sporting nature of both models. Nevertheless the coupe once fitted, as many were, with a steel sunroof, was at the end of 1953 offered for 22,000 Marks which was nearly twice the price for the standard W187 "Limousine", and only 85 of the W187 coupes were actually sold.
All 220s used newly developed Type M 180 six cylinder 2195cc engine producing 80 hp DIN (86 SAE) (59 kW). In contrast with the rather old fashioned look of the car's body, the new engines attracted much attention in the motoring press, being the first new engine presented by Mercedes-Benz in more than ten years. The valves were operated by short rocker arms from an overhead camshaft. The engine was unusual in Europe at this time in having oversquare cylinder dimensions with a bore of 80.0mm and a stroke of only 72.8mm, which facilitated the design of an efficient cylinder head. The manufacturer was able to claim a top speed of 140 km/h (87 mph) for the saloons and 145 km/h (90 mph) for the cabriolets which was usefully faster than the 52 PS (38 kW) powered 170S Cabriolet which the cabriolet version of the W187 replaced and from which its bodywork was derived. The new six cylinder engine would form the basis, repeatedly enlarged and upgraded as the years went on, for a long line of six cylinder engines powering mainstream Mercedes-Benz models including the six cylinder version of the early S-Class models in the 1970s.