2016-2017 Mercedes-Benz S-class Long (V222) S 350d V6 (258 Hp) 4MATIC 9G-TRONIC

Technical Specifications

The Mercedes-Benz S 350d 4MATIC Long, produced between February 2016 and May 2017, represents a significant iteration of the V222 S-Class generation. The V222 generation, launched in 2013, represented a leap forward in automotive technology, and the S 350d aimed to bring those advancements to a wider audience with a more fuel-efficient powertrain. This variant occupied a middle ground in the S-Class hierarchy, offering a compelling alternative to the more powerful S 500 and AMG models, while providing superior refinement and economy compared to the entry-level S 300h hybrid (where offered). Its primary markets were Europe and Asia, where diesel engines were – and in some cases still are – favored for their torque and fuel efficiency, particularly in long-distance driving.

Powertrain & Engine Architecture

At the heart of the S 350d 4MATIC Long lies the OM 642.861 3.0-liter V6 turbodiesel engine. This engine is a sophisticated design featuring a common-rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. The engine utilizes a single variable geometry turbocharger (VGT) and an intercooler to maximize power and torque while minimizing emissions. The V6 configuration provides inherent smoothness and balance. The engine produces 258 horsepower at 3400 rpm and a substantial 620 Nm (457 lb-ft) of torque between 1600 and 2400 rpm. This broad torque curve is a hallmark of diesel engines, providing effortless acceleration and strong pulling power. Paired with the engine is the 9G-TRONIC nine-speed automatic transmission. This transmission is designed for smooth and efficient gear changes, contributing to both performance and fuel economy. The 9G-TRONIC features a wide gear ratio spread, allowing the engine to operate in its most efficient range more often.

Driving Characteristics

The S 350d 4MATIC Long delivers a driving experience characterized by refinement and effortless power. While not as overtly sporty as some of its gasoline-powered siblings, the 620 Nm of torque provides strong acceleration in all situations. The 0-60 mph time of around 6.2 seconds is respectable for a large luxury sedan. The 9G-TRONIC transmission contributes to a seamless driving experience, with gear changes being almost imperceptible. The long wheelbase and air suspension provide a supremely comfortable ride, effectively isolating passengers from road imperfections. The 4MATIC all-wheel-drive system ensures confident handling in all weather conditions, providing enhanced traction and stability. Compared to the S 500, the S 350d offers less outright power, but its superior torque and lower weight result in similar real-world acceleration in many scenarios. The S 350d also offers significantly better fuel economy.

Equipment & Trim Levels

The S 350d 4MATIC Long came generously equipped, reflecting its position as a flagship luxury sedan. Standard features typically included leather upholstery, heated and ventilated front seats with massage functions, a premium sound system, a large infotainment screen with navigation, and a comprehensive suite of driver-assistance systems, including adaptive cruise control, lane-keeping assist, and automatic emergency braking. The long wheelbase provided ample rear legroom, and rear passengers benefited from individual climate control and entertainment options. Optional extras included a panoramic sunroof, upgraded leather trim, a rear-seat entertainment system, and various customization options through Mercedes-Benz’s Designo program.

Chassis & Braking

The S 350d 4MATIC Long features a sophisticated chassis designed for both comfort and handling. The front suspension utilizes a multi-link setup with air suspension and a transverse stabilizer bar, while the rear suspension employs a similar multi-link design with air suspension. The air suspension allows for adjustable ride height and damping, further enhancing ride comfort. Braking duties are handled by ventilated discs on all four wheels, providing ample stopping power. The anti-lock braking system (ABS) and electronic stability control (ESC) are standard features, enhancing safety and control. The 4MATIC all-wheel-drive system distributes power between the front and rear axles as needed, optimizing traction and stability.

Market Reception & Comparison

The S 350d 4MATIC Long was generally well-received by automotive critics. It was praised for its refined driving experience, luxurious interior, and impressive fuel economy. Critics noted that the diesel engine provided ample power and torque for comfortable cruising, while the 9G-TRONIC transmission contributed to a smooth and efficient driving experience. Compared to the S 500, the S 350d offered a more economical option without sacrificing too much in terms of performance or luxury. However, some critics noted that the diesel engine was not as refined or responsive as the gasoline engines offered in the S-Class range. Fuel economy figures consistently demonstrated the S 350d’s advantage, with combined cycle figures typically ranging from 5.7 to 6.4 l/100 km (41.3 to 36.8 US mpg).

Legacy

The OM 642 engine family, including the OM 642.861 found in the S 350d, has a reputation for durability and reliability. While diesel engines are subject to stricter emissions regulations and potential maintenance costs associated with diesel particulate filters (DPF) and AdBlue systems, these engines are generally known to be long-lasting. On the used car market, the S 350d 4MATIC Long remains a desirable option for buyers seeking a luxurious and efficient grand tourer. Well-maintained examples command a premium price, reflecting the S-Class’s enduring reputation for quality and refinement. The combination of luxury, performance, and fuel economy continues to make this variant a compelling choice for discerning buyers.