1966 Mercedes-Benz W109 SEL Dimensions, Size & Specs

The curb weight of the Mercedes-Benz W109 SEL varies from 1630 kg to 1780 kg (approximately 3593 lbs to 3924 lbs), which is relatively heavy due to its large size and luxurious equipment. This mass contributes to a solid, stable ride and absorbs road imperfections well, enhancing passenger comfort. The maximum permissible weight ranges from 2130 kg to 2280 kg (about 4698 lbs to 5026 lbs), accounting for passengers and cargo. The significant weight necessitates a robust engine and suspension setup, which Mercedes-Benz engineered carefully to ensure reliable performance, smooth handling, and safe braking. While the heavier weight might reduce agility compared to smaller cars, it elevates comfort and road stability, which was crucial for a luxury sedan of its time.

The Mercedes-Benz W109 SEL is 5000 mm (196.9 inches) long and 1810 mm (71.3 inches) wide. Standard residential garage dimensions typically range around 2438 mm to 2743 mm (8 to 9 feet) in width and about 4877 mm to 5486 mm (16 to 18 feet) in length. This means the W109 SEL will generally fit lengthwise into most standard garages but may be a tight fit widthwise depending on the garage interior dimensions and door width. Owners should ensure a minimum inside width of 2.0 meters (about 78.7 inches) to accommodate opening doors comfortably and provide space for ingress and egress. The relatively modest height of up to 1440 mm (56.7 inches) means vertical clearance is less of a concern.

The slight height variation between 1420 mm and 1440 mm (55.9 to 56.7 inches) in the W109 SEL is primarily due to differences in suspension settings, optional equipment, or whether the vehicle is in a loaded or unloaded state. Some W109 SEL models featured adjustable hydropneumatic suspension systems, which could raise or lower the ride height to improve ride comfort or ground clearance. This variation does not significantly impact usability but allows the driver to adapt to different driving conditions, such as rough roads or parking situations. Overall, the small difference in height enhances the vehicle’s versatility without compromising its elegant profile.

The Mercedes-Benz W109 SEL came with rim sizes of 6J x 14 and an option for wider 6.5J x 14 rims. These 14-inch steel wheels were fitted with tires suitable for that era, balancing ride comfort and handling. The standard 6J x 14 rims contribute to a cushioned ride, absorbing road imperfections effectively, which aligns with the vehicle’s luxury sedan status. The wider 6.5J x 14 rims provide better grip and slightly improved cornering stability at the cost of a firmer ride feel. Overall, both rim sizes complemented the suspension setup to deliver a comfortably smooth driving experience typical for Mercedes-Benz vehicles in the late 1960s and early 1970s.

The W109 SEL succeeded the earlier W112 and W108 models, with notable improvements in overall dimensions and luxury. The W109 SEL maintained similar length (around 5 meters) but typically offered more refined aerodynamic styling and a slightly wider body at 1810 mm compared to some earlier versions. Height variations also improved ride comfort due to advanced suspension systems. The curb weight increased due to added features and safety equipment, reflecting the evolution toward a more opulent flagship sedan. While the predecessor models provided a solid foundation, the W109 SEL represented a marked step forward in terms of technology, comfort, and refined exterior dimensions, setting a higher benchmark for luxury sedans in its class.

When compared with its contemporary luxury sedans such as the Jaguar Mark X or the BMW E3 series, the Mercedes-Benz W109 SEL is competitive in size but slightly larger in length and width than many peers. Its length of 5000 mm (196.9 inches) often exceeds that of competitors, lending it an imposing road presence. The width of 1810 mm (71.3 inches) is also on the higher side for the late 1960s, contributing to spacious interiors. The W109 SEL’s advanced suspension and high curb weight emphasize comfort and ride quality rather than sporty handling. These size advantages, coupled with Mercedes-Benz's engineering, allowed the W109 SEL to dominate the luxury sedan category for buyers seeking space, comfort, and prestige.

While specific interior measurements of the Mercedes-Benz W109 SEL are not as commonly documented as exterior dimensions, the generous exterior size translates to a spacious cabin environment. The 5000 mm (196.9 inches) length allows for long wheelbase versions featuring ample rear legroom, especially in the SEL (Super-Long) models that were designed for chauffeured driving. With a width of 1810 mm (71.3 inches), the cabin accommodates comfortable shoulder space for front and rear passengers. High-quality materials and plush seating reinforce the luxury experience. Rear passengers enjoy enhanced legroom and headroom, and the relatively tall interior design ensures a comfortable seating posture for all occupants.

The curb weight of the W109 SEL ranges from 1630 kg to 1780 kg (approximately 3593 to 3924 lbs), with the maximum permissible weight reaching up to 2280 kg (about 5026 lbs). This considerable mass requires powerful engine options to maintain good performance and acceptable fuel efficiency for its time. Generally, the W109 was equipped with inline-6 and V8 engines, delivering smooth power output that balances the need for effortless acceleration with the luxury character of the car. While fuel efficiency was not a primary focus in this era’s large luxury sedans, the heavy weight resulted in moderate consumption figures. However, the weight contributes to the vehicle’s stable ride and road manners, valued more highly in its market segment than economy.

Produced between 1965 and 1972, the Mercedes-Benz W109 SEL was positioned as a flagship luxury sedan for the brand, often aiming for executives, dignitaries, and luxury car buyers looking for prestige and comfort. The W109 SEL, with its extended wheelbase, hydropneumatic suspension options, and upscale appointments, provided one of the most comfortable rides available in its class during that era. It was often used as a chauffeur-driven car but equally capable as a personal luxury sedan. Its design ethos emphasized quietness, smoothness, and elegance, positioning it as an icon of German automotive engineering and luxury throughout the late 60s and early 70s.