2017-2020 Mercedes-Benz S-class Long (V222 facelift ) S 350d (286 Hp) 4MATIC G-TRONIC

The Mercedes-Benz S 350d 4MATIC G-TRONIC, part of the V222 facelift generation of the S-Class Long, was produced from 2017 to 2020. This variant occupied a significant position in the S-Class lineup as a diesel-powered option offering a balance between performance, luxury, and fuel efficiency. The “Long” designation indicates an extended wheelbase, providing increased rear passenger legroom, a key feature for markets prioritizing chauffeur-driven experiences. It represented a core offering within the range, positioned below the more powerful S 500 and above the entry-level S 320d (where offered), catering to buyers seeking a refined and capable luxury sedan.

Technical Specifications

INTRODUCTION

The S 350d 4MATIC G-TRONIC, introduced with the V222 facelift in 2017, represented Mercedes-Benz’s commitment to offering a refined diesel option within its flagship S-Class range. The V222 generation, produced from 2013-2020, underwent a significant refresh in 2017, incorporating updated styling, enhanced technology, and revised engine options. The S 350d, with its extended wheelbase, was particularly popular in markets where rear passenger comfort and prestige were highly valued. It aimed to deliver the S-Class experience – unparalleled luxury, advanced safety features, and a smooth ride – with the added benefits of diesel’s fuel economy and torque.

Powertrain & Engine Architecture

At the heart of the S 350d lies the OM 656.929, a 2.9-liter inline-six cylinder diesel engine. This engine marked a significant departure from the previous V6 diesel offerings, utilizing a modular design and advanced technologies. The OM 656 features a steel piston, a two-stage turbocharging system with variable turbine geometry, and a CAMMATIC variable valve train on both the intake and exhaust sides. This CAMMATIC system allows for continuously variable valve timing and lift, optimizing engine performance and efficiency. Fuel is delivered via a common rail direct injection system operating at extremely high pressures (2700 bar), ensuring precise fuel atomization and combustion. The engine is paired with Mercedes-Benz’s 9G-TRONIC nine-speed automatic transmission. This transmission is known for its smooth shifts, wide gear ratio spread, and contribution to fuel efficiency. The 4MATIC all-wheel-drive system distributes power between the front and rear axles, enhancing traction and stability in various driving conditions.

Driving Characteristics

The S 350d 4MATIC G-TRONIC delivers a driving experience characterized by effortless power and refinement. The 600 Nm (442.54 lb-ft) of torque, available from a low 1200 rpm, provides strong acceleration and relaxed cruising. While not as overtly sporty as the higher-powered S-Class variants, the S 350d offers a 0-60 mph time of around 5.5 seconds, which is more than adequate for most drivers. The 9G-TRONIC transmission contributes to a smooth and seamless driving experience, with well-spaced gear ratios that keep the engine in its optimal power band. Compared to the S 500 with its V8 engine, the S 350d prioritizes fuel efficiency and torque delivery over outright horsepower. The S 350d also feels more composed and less prone to wheelspin than rear-wheel-drive S-Class models, thanks to the 4MATIC system.

Equipment & Trim Levels

The S 350d 4MATIC G-TRONIC came generously equipped as standard. Typical features included leather upholstery, heated and ventilated front seats with massage functions, a premium Burmester surround sound system, a large infotainment display with Mercedes’ MBUX system, and a comprehensive suite of driver-assistance technologies such as adaptive cruise control, lane-keeping assist, and automatic emergency braking. Optional extras included rear-seat entertainment systems, upgraded leather packages, various wood and trim options, and advanced suspension systems like MAGIC RIDE air suspension. The interior design emphasized luxury and comfort, with high-quality materials and meticulous attention to detail. The extended wheelbase provided ample rear legroom, making it a particularly appealing choice for chauffeured transport.

Chassis & Braking

The S-Class Long utilized an advanced chassis design featuring an independent multi-link suspension at both the front and rear. This suspension setup, often paired with the optional MAGIC RIDE air suspension, provided a remarkably smooth and comfortable ride, effectively isolating passengers from road imperfections. The S 350d was equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The braking system incorporated ABS (Anti-lock Braking System), Electronic Stability Program (ESP), and other advanced safety features. The steering system was a rack-and-pinion setup with electric power assistance, offering precise and responsive steering feel.

Market Reception & Comparison

The S 350d 4MATIC G-TRONIC was well-received by automotive critics, who praised its blend of luxury, performance, and fuel efficiency. It was often seen as a sensible alternative to the more expensive and less fuel-efficient S 500. Compared to the S 320d (where available), the S 350d offered a noticeable power increase and a more refined driving experience. Fuel economy figures were competitive for its class, with combined fuel consumption ranging from 5.5 to 5.7 l/100 km. Reliability reports generally indicated good dependability, although, like all complex luxury vehicles, the S-Class could be expensive to maintain.

Legacy

The OM 656 engine family, introduced with the S 350d, has proven to be a robust and reliable powerplant. The S 350d 4MATIC G-TRONIC remains a desirable used car option, offering a compelling combination of luxury, performance, and fuel efficiency. While newer S-Class models have introduced even more advanced technologies, the V222 facelift S 350d continues to represent a high standard of automotive engineering and refinement. Its long-term reliability, coupled with the prestige of the S-Class badge, ensures its continued appeal in the used car market.