The Mercedes-Benz W180 II Cabriolet 220 S represents a pivotal moment in post-war German automotive engineering. Produced between August 1957 and October 1959, this elegant convertible was part of the “Ponton” series, a generation of Mercedes-Benz vehicles that marked a significant departure from the pre-war designs. The Ponton models, named for their unibody construction resembling a pontoon boat, prioritized passenger comfort and spaciousness. The 220 S Cabriolet, positioned as a luxury offering, catered to a discerning clientele seeking sophisticated motoring in a rapidly recovering Europe. While not officially exported in large numbers to the United States, the W180 series, and particularly the Cabriolet, became highly sought after by American enthusiasts for its classic styling and engineering.
The Mercedes-Benz W180 II Cabriolet 220 S
The W180 series, encompassing the 180, 180A, 180B, 180C, 180D, and 220 S models, was a cornerstone of Mercedes-Benz’s resurgence in the 1950s. The 220 S, introduced in 1959 as a replacement for the earlier 220, featured a larger engine and improved refinements. The Cabriolet version, with its fully retractable soft top, embodied the era’s optimism and desire for open-air motoring. It was a statement of success and a symbol of the burgeoning post-war economy. The car’s design, while rooted in the functional aesthetic of the time, possessed a timeless elegance that continues to captivate collectors today.
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 106 horsepower at 5200 rpm and 171 Nm (126.12 lb.-ft.) of torque at 3500 rpm. While these figures may seem modest by modern standards, they were respectable for the late 1950s, providing smooth and refined power delivery. 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 achieved a top speed of 160 km/h (99.42 mph). The weight-to-power ratio of 13.1 kg/Hp and a weight-to-torque ratio of 8.1 kg/Nm contributed to a driving experience that prioritized comfort and stability over outright speed. Fuel consumption was rated at 10.7 l/100 km (22 US mpg, 26.4 UK mpg, 9.3 km/l).
Design & Features
The W180 II Cabriolet 220 S is a two-door, five-seater convertible. Its body style is characterized by clean lines, a relatively low roofline (for the era), and generous glass areas. The Ponton design, with its integrated fenders and lack of separate running boards, gave the car a modern and streamlined appearance. The interior was appointed with high-quality materials, including leather upholstery and wood trim, reflecting the car’s luxury positioning. While safety features were limited by the standards of the time, the car offered a robust construction and predictable handling. The convertible top, when lowered, stowed neatly behind the rear seats, transforming the car into an open-air cruiser. The car’s dimensions – 4700 mm (185.04 in) in length, 1790 mm (70.47 in) in width, and 1530 mm (60.24 in) in height – provided ample space for passengers and luggage. The wheelbase measured 2700 mm (106.3 in), contributing to a comfortable ride.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | Ponton |
| Generation | W180 II Cabriolet |
| Type (Engine) | 220 S (106 Hp) |
| Start of production | August, 1957 |
| End of production | October, 1959 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 5 |
| Doors | 2 |
| Fuel consumption (combined) | 10.7 l/100 km |
| Fuel consumption (US mpg) | 22 US mpg |
| Fuel consumption (UK mpg) | 26.4 UK mpg |
| Fuel consumption (km/l) | 9.3 km/l |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 17 sec |
| Acceleration 0 – 62 mph | 17 sec |
| Acceleration 0 – 60 mph | 16.2 sec |
| Maximum speed | 160 km/h (99.42 mph) |
| Weight-to-power ratio | 13.1 kg/Hp |
| Hp/tonne | 76.5 Hp/tonne |
| Weight-to-torque ratio | 8.1 kg/Nm |
| Nm/tonne | 123.5 Nm/tonne |
| Power | 106 Hp @ 5200 rpm |
| Power per litre | 48.3 Hp/l |
| Torque | 171 Nm @ 3500 rpm (126.12 lb.-ft. @ 3500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 180 III / 180.924 |
| Engine displacement | 2195 cm3 (133.95 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 80.01 mm (3.15 in) |
| Piston Stroke | 72.8 mm (2.87 in) |
| Compression ratio | 8.7:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Carburettor |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | SOHC |
| Kerb Weight | 1385 kg (3053.4 lbs) |
| Max. weight | 1790 kg (3946.27 lbs) |
| Max load | 405 kg (892.87 lbs) |
| Fuel tank capacity | 64 l (16.91 US gal | 14.08 UK gal) |
| Length | 4700 mm (185.04 in) |
| Width | 1790 mm (70.47 in) |
| Height | 1530 mm (60.24 in) |
| Wheelbase | 2700 mm (106.3 in) |
| Front track | 1430 mm (56.3 in) |
| Rear track | 1470 mm (57.87 in) |
| Drivetrain Architecture | Rear wheel drive |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 4 gears, manual transmission |
| Front suspension | Double wishbone, Transverse stabilizer |
| Rear suspension | Trailing arm |
| Front brakes | Drum |
| Rear brakes | Drum |
| Steering type | Cone worm with recirculation balls |
The Mercedes-Benz W180 II Cabriolet 220 S remains a highly desirable classic car, representing a significant chapter in the company’s history. Its blend of elegant styling, robust engineering, and comfortable driving experience ensures its continued appeal to collectors and enthusiasts worldwide.




