The Mercedes-Benz W128, commonly known as the Ponton, was a series of luxury cars produced by Mercedes-Benz from 1953 to 1959. The W128 series included various body styles, including sedans, coupes, and convertibles. The Ponton Convertible, also referred to as the Cabriolet A or Cabriolet D, was among the open-top variants offered.

Stylistically, the Ponton Convertible featured the classic design elements of the era, characterized by its elegant lines, rounded shapes, and a distinct sense of luxury. The Ponton series marked a departure from Mercedes-Benz's pre-war designs, introducing a more modern, unibody construction with pontoon-style fenders, thus earning the "Ponton" nickname.

The convertible variant of the W128 Ponton was available in two models, the Cabriolet A and the Cabriolet D. The Cabriolet A was a two-seater convertible, while the Cabriolet D featured seating for four occupants. Both models offered a power-operated soft-top roof, allowing for open-air driving experiences.

Under the hood, the Ponton Convertible was powered by various inline-six-cylinder engines, known for their reliability and smooth performance. These engines provided adequate power for comfortable cruising, typical of luxury cars of that era.

The interior of the Ponton Convertible was designed with a focus on luxury and comfort. It featured high-quality materials, finely crafted wood trim, and plush seating upholstered in leather, providing a luxurious and sophisticated cabin environment.

The W128 Ponton series, including the convertible models, was considered advanced and luxurious for its time, showcasing Mercedes-Benz's commitment to quality craftsmanship, engineering excellence, and comfort.

While the W128 series, including the Ponton Convertible, might lack the modern amenities and technology seen in contemporary cars, it remains a classic symbol of Mercedes-Benz's heritage, appreciated for its timeless design, elegance, and historical significance in the automotive world.