1999-2002 Mercedes-Benz S-class Long (V220) S 320 V6 (224 Hp) 5G-TRONIC

The Mercedes-Benz S-Class Long (V220) S 320 V6, produced from 1999 to 2002, represented a significant evolution in luxury sedan design and technology. As part of the W220 series, the “Long” wheelbase version offered enhanced rear passenger space, catering to a market that valued comfort and prestige. This variant, powered by a 3.2-liter V6 engine producing 224 horsepower and paired with a 5G-TRONIC automatic transmission, occupied a middle ground within the S-Class lineup, offering a balance between performance and fuel efficiency. It was positioned below the flagship V8 models (S430 and S500) but above any potential inline-6 offerings, appealing to buyers seeking a refined driving experience without the higher price tag and running costs of the larger engines.

Technical Specifications

INTRODUCTION

The V220 S-Class, launched in 1998, marked a significant departure for Mercedes-Benz, introducing a fully redesigned model with a focus on advanced technology and enhanced safety features. The S 320 V6 Long, specifically, was aimed at buyers who desired the spaciousness of the long-wheelbase model but didn’t require the outright performance of the V8 variants. Production ran from 1999 to 2002, and it quickly became a popular choice for those seeking a luxurious and comfortable grand tourer. The car was primarily sold in Europe and Asia, with limited availability in the North American market where larger engines were generally preferred.

Powertrain & Engine Architecture

At the heart of the S 320 V6 Long lies the M112 E 32 engine, a 3.2-liter naturally aspirated V6. This engine, part of Mercedes’ new modular engine family, featured all-aluminum construction, three valves per cylinder, and a sophisticated multi-port fuel injection system. The engine code 112.944 specifically identifies this variant. The M112 was known for its smooth operation and relatively high specific output. The 5G-TRONIC automatic transmission, a five-speed unit, was a key component of the powertrain. This transmission offered smooth and responsive shifts, contributing to the car’s refined driving experience. It featured adaptive shift programming, adjusting shift points based on driving style and conditions. The transmission was electronically controlled, further enhancing its efficiency and responsiveness.

Driving Characteristics

The S 320 V6 Long, with its 224 horsepower and 232 lb-ft of torque, offered respectable performance for its size and class. Acceleration from 0-60 mph took around 7.8 seconds, and it had a top speed of 149 mph. However, its primary focus wasn’t outright speed but rather effortless cruising and comfortable long-distance travel. The 5G-TRONIC transmission was geared for relaxed highway driving, with taller gear ratios prioritizing fuel efficiency. Compared to the S430 or S500, the S 320 felt less urgent in its acceleration, but it provided ample power for everyday driving situations. The longer wheelbase contributed to a more stable and composed ride, particularly at higher speeds.

Equipment & Trim Levels

The S 320 V6 Long came standard with a comprehensive list of luxury features, befitting its flagship status. These included leather upholstery, wood trim, automatic climate control, power-adjustable front seats with memory function, and a premium sound system. Optional extras were plentiful, including a rear entertainment system, massaging seats, a sunroof, and advanced parking assist features. The interior design emphasized elegance and sophistication, with a focus on high-quality materials and meticulous craftsmanship. Trim levels were relatively limited, with most customization occurring through the selection of optional packages.

Chassis & Braking

The S-Class Long featured a fully independent suspension system, with multi-link setups at both the front and rear. This provided a comfortable and controlled ride, absorbing bumps and imperfections in the road with ease. The S 320 V6 Long utilized ventilated disc brakes at the front and solid disc brakes at the rear. Anti-lock braking system (ABS) was standard, enhancing safety and stability during hard braking. The steering was a rack-and-pinion system with hydraulic power assistance, providing precise and responsive steering feel. The long wheelbase and increased weight of the Long version necessitated a slightly softer suspension setup compared to the standard wheelbase S-Class.

Market Reception & Comparison

The S 320 V6 Long was generally well-received by automotive critics, who praised its comfortable ride, luxurious interior, and refined powertrain. However, some reviewers noted that the V6 engine lacked the punch of the V8 models. Fuel economy was considered reasonable for a car of its size and class, averaging around 20.5 mpg combined. Compared to the S430, the S 320 offered a more affordable entry point into the S-Class range, but at the expense of some performance. Reliability was generally good, although the complex electronic systems of the W220 generation could be prone to occasional issues.

Legacy

The Mercedes-Benz S-Class Long (V220) S 320 V6 remains a desirable classic car today, particularly among enthusiasts who appreciate its blend of luxury, comfort, and technology. The M112 engine is known for its durability, and well-maintained examples can still provide years of reliable service. While not as sought-after as the V8 models, the S 320 V6 Long offers a compelling value proposition in the used car market, providing a taste of S-Class luxury at a more accessible price point. Its advanced features and comfortable ride continue to impress, making it a worthy successor to the legacy of the S-Class nameplate.