1956-1957 Mercedes-Benz W180 II Cabriolet 220 S (100 Hp)

The Mercedes-Benz W180 II Cabriolet 220 S, produced from July 1956 to August 1957, represents a pinnacle of post-war German automotive engineering and design. Part of the “Ponton” series – a name derived from the car’s pontoon-like, integrated body construction – the 220 S Cabriolet was a luxury offering aimed at discerning customers seeking open-air motoring with the renowned Mercedes-Benz quality and prestige. This model occupied the upper-middle-class segment, competing with other premium convertibles of the era. The W180 series as a whole was significant for introducing unibody construction to Mercedes-Benz, a departure from the traditional body-on-frame design, enhancing both safety and passenger comfort.

The Mercedes-Benz W180 II Cabriolet 220 S

The W180 series, launched in 1954, marked a turning point for Mercedes-Benz. The “Ponton” design, characterized by its low-slung profile and fully integrated fenders, was a radical departure from the previous models. The 220 S, introduced in 1956, was the top-of-the-line variant, featuring a larger engine and more luxurious appointments. The Cabriolet version, with its elegant soft-top and sophisticated styling, was particularly sought after. While not a high-volume seller compared to the sedan models, the 220 S Cabriolet remains a highly collectible classic today, embodying the elegance and engineering prowess of the 1950s.

Engine & Performance

The heart of the 220 S Cabriolet is its 2.2-liter (2195 cm³) inline-six cylinder engine, designated the M180 III / 180.924. This naturally aspirated engine produced 100 horsepower at 4800 rpm and 162 Nm (119.49 lb.-ft.) of torque at 3500 rpm. While these figures may seem modest by modern standards, they were respectable for the mid-1950s, providing smooth and refined performance. The engine featured a single overhead camshaft (SOHC) valvetrain and utilized a carburetor fuel injection system. Power is delivered to the rear wheels through a four-speed manual transmission. Acceleration from 0 to 100 km/h (0-62 mph) took approximately 17 seconds, and the car could achieve a top speed of 160 km/h (99.42 mph). The weight-to-power ratio of 13.9 kg/Hp and a weight-to-torque ratio of 8.5 kg/Nm indicate a balanced, though not overtly sporty, driving experience. Fuel economy was rated at 10.7 l/100 km (22 US mpg, 26.4 UK mpg).

Design & Features

The W180 II Cabriolet 220 S is a two-door, five-seater convertible. Its design is characterized by clean lines, a low profile, and a spacious cabin. The integrated fenders and rounded body shape contribute to the car’s distinctive “Ponton” appearance. The convertible top, when lowered, creates a stylish and open-air driving experience. Inside, the 220 S Cabriolet offered a luxurious interior with comfortable seating and high-quality materials. While safety features were limited by the standards of the time, the unibody construction provided improved structural integrity compared to older body-on-frame designs. The car’s suspension system, featuring double wishbones with a transverse stabilizer at the front and a trailing arm setup at the rear, aimed to provide a comfortable ride. Braking was handled by drum brakes on all four wheels. The steering system employed a cone worm with recirculation balls, offering precise control. The overall aesthetic of the 220 S Cabriolet was one of understated elegance and refined luxury, appealing to a sophisticated clientele.

Technical Specifications