Mercedes-Benz W112 Cabriolet 300 SE (160 Hp)

The Mercedes-Benz W112 Cabriolet 300 SE represents a pinnacle of 1960s German engineering and luxury. Produced between February 1962 and January 1964, this model was the open-top variant of the W112 series, designed to offer a sophisticated and comfortable grand touring experience. Positioned in the upper-luxury segment, the 300 SE Cabriolet catered to discerning customers seeking a blend of performance, refinement, and exclusivity. It was never officially sold in the United States, but examples were imported privately, becoming highly sought-after collector’s items. The W112 series, including the Cabriolet, served as a bridge between the older fintail models and the more modern W108/W109 series, incorporating advanced technology for its time.

Mercedes-Benz W112 Cabriolet 300 SE: A Legacy of Luxury

The W112 series was conceived as a technologically advanced and luxurious offering from Mercedes-Benz. The 300 SE, in particular, was notable for its sophisticated fuel injection system and refined chassis. The Cabriolet version, with its elegant open-top design, further enhanced the car’s appeal to those desiring a stylish and comfortable touring vehicle. While production numbers were relatively low compared to other Mercedes-Benz models of the era, the W112 Cabriolet 300 SE has become a highly collectible classic, prized for its rarity, build quality, and historical significance.

Engine & Performance

The heart of the 300 SE Cabriolet is its 2,996 cc (182.83 cu. in.) inline-six cylinder engine, designated M 189 I / 189.985. This engine produced 160 horsepower at 5000 rpm and 251 Nm (185.13 lb.-ft.) of torque at 3800 rpm. A key feature was its Bosch multi-port manifold fuel injection system, a relatively advanced technology for the early 1960s, contributing to smooth power delivery and improved fuel efficiency compared to carbureted engines. The engine’s power output translated to a 0-60 mph (0-96 km/h) acceleration time of approximately 11.9 seconds and a top speed of 185 km/h (114.95 mph). The engine’s specific output was 53.4 horsepower per liter. Power is delivered to the rear wheels through a four-speed manual transmission. The weight-to-power ratio of 10.6 kg/Hp and a weight-to-torque ratio of 6.7 kg/Nm provided a respectable, though not overtly sporty, driving experience, prioritizing comfort and refinement.

Design & Features

The W112 Cabriolet 300 SE boasts a classic, elegant design typical of the early 1960s. Its body style is a two-door cabriolet with seating for five passengers. The car’s long hood, flowing lines, and relatively restrained chrome trim contribute to its sophisticated appearance. The convertible top, when lowered, creates a truly open-air driving experience. The interior is characterized by high-quality materials, including leather upholstery and wood trim, reflecting the car’s luxury positioning.

Technologically, the W112 featured advanced suspension for its time. The front suspension utilized a double wishbone setup with a transverse stabilizer and, notably, air suspension. The rear suspension also employed air suspension with a transverse stabilizer and trailing arms. This air suspension system provided a remarkably smooth and comfortable ride, absorbing road imperfections effectively. Braking duties were handled by disc brakes on all four wheels, a significant safety advancement for the era. Steering was accomplished via a cone worm with recirculation balls system. The car’s dimensions – 4880 mm (192.13 in.) in length, 1845 mm (72.64 in.) in width, and 1400 mm (55.12 in.) in height – positioned it as a substantial vehicle, befitting its luxury status.

Technical Specifications