1958 Mercedes-Benz W128 Coupe Dimensions, Size & Specs

The curb weight of the Mercedes-Benz Ponton W128 Coupe ranges from 1380 to 1400 kilograms (approximately 3042 to 3086 pounds), while its maximum weight lies between 1810 and 1830 kilograms (3991 to 4037 pounds). This weight range reflects the car's robust build quality and the luxury features typical of Mercedes-Benz Coups of that time, contributing to its solid road presence and ride comfort.

As a two-door coupe, the Mercedes-Benz Ponton W128 offers seating primarily for four passengers with modest rear legroom typical of coupes from the late 1950s. While exact interior dimensions are not commonly specified, the exterior width of 1790 mm (70.5 in) and the coupe design provide a comfortable and intimate cabin space emphasizing luxury materials and craftsmanship rather than expansive rear passenger room.

Yes, the Mercedes-Benz Ponton W128 Coupe fits comfortably into a standard modern garage. With a width of 1790 mm (70.5 inches) and length of 4700 mm (185 inches or 4.7 meters), it fits well within typical garage dimensions that are roughly 2.5 meters (98 inches) wide and 5 meters (196 inches) long. Its height of 1530 mm (60.2 inches) also ensures ample vertical clearance.

The W128 Coupe followed the earlier Ponton models, notably the W120 and W121. Compared to these predecessors, the W128 Coupe is longer and wider, emphasizing a more luxurious and elegant body style. The 4700 mm (185 in) length and 1790 mm (70.5 in) width represent a slight increase allowing for a more refined coupe silhouette. This generation brought advances in styling and interior appointments, positioning it as an upscale model relative to the more utilitarian earlier Ponton sedans.

In the late 1950s, luxury coupes like the Jaguar XK150 and BMW 503 offered competitive dimensions. The W128's length of 4700 mm (185 in) and width of 1790 mm (70.5 in) make it slightly larger than the Jaguar XK150 (approx. 4500 mm length) but comparable to the BMW 503. It stands out for its solid German engineering, blending classic proportions with a slightly more substantial build, which translated into a comfortable ride and presence comparable or sometimes larger than its contemporaries.

Compared to the four-door Ponton sedans (W120/W121), the W128 Coupe is very close in width (around 1790 mm or 70.5 in) but generally longer and with a lower roofline (height of 1530 mm or 60.2 in). The coupe's design favors a sportier, more streamlined profile, trading rear passenger space for style and elegance, whereas sedans prioritized passenger capacity and practicality.

The Mercedes-Benz Ponton W128 Coupe is distinguished by its two-door coupe body style, elegant sweep of the roofline, and more luxurious trim compared to the sedans and cabriolets in the Ponton lineup. It features classic Ponton styling with rounded fenders and integrated headlights, yet adds coupe-specific enhancements like frameless side windows and a sportier stance. It was designed to combine luxury with a distinctive silhouette that set it apart from more utilitarian Ponton models.

The Mercedes-Benz Ponton W128 Coupe typically came with a 2.2-liter inline six-cylinder engine, offering smooth power delivery characteristic of Mercedes-Benz's engineering in the late 1950s. While exact horsepower figures varied, the emphasis of the W128 was on refined cruising rather than outright speed, making it a comfortable grand tourer with a balanced combination of performance, reliability, and luxury.

Maintenance of the Mercedes-Benz Ponton W128 Coupe can be somewhat challenging due to the vehicle’s age and rarity. However, because it was a notable model for Mercedes-Benz with a strong enthusiast following, there is a reasonable availability of parts either through specialist suppliers, classic car restoration experts, or Mercedes-Benz vintage parts programs. Maintenance requires knowledgeable mechanics familiar with vintage Mercedes-Benz vehicles to ensure authenticity and proper care.