2010-2013 Mercedes-Benz S-class Long (V221 facelift ) S 350 CDI BlueTEC (258 Hp) G-TRONIC

The Mercedes-Benz S 350 CDI BlueTEC Long, produced from 2010 to 2013, represents a significant iteration of the V221 S-Class generation, specifically the facelifted model introduced in 2009. Positioned as a premium executive sedan, the S 350 CDI BlueTEC Long catered to buyers seeking a blend of luxury, performance, and fuel efficiency within the flagship S-Class range. The “Long” designation indicates an extended wheelbase, providing enhanced rear passenger space – a particularly desirable feature in markets like China and other regions where chauffeur-driven travel is common. This variant occupied a middle ground in the S-Class lineup, offering a compelling alternative to the more powerful S 500 and S 600 models, while providing superior performance and economy compared to the entry-level S 300.

Technical Specifications

Powertrain & Engine Architecture

The S 350 CDI BlueTEC Long is powered by the OM 642.862 3.0-liter V6 turbodiesel engine. This engine is a cornerstone of Mercedes-Benz’s diesel offerings, known for its robust construction and refined operation. The ‘BlueTEC’ designation signifies the inclusion of advanced emissions control technologies, including a diesel particulate filter (DPF) and a selective catalytic reduction (SCR) system utilizing AdBlue (diesel exhaust fluid) to reduce nitrogen oxide (NOx) emissions, ensuring compliance with stringent Euro 6 standards. The engine employs a common rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. The turbocharger, coupled with an intercooler, enhances power output and efficiency. The 7G-TRONIC automatic transmission, a seven-speed unit, provides smooth and efficient gear changes, contributing to both performance and fuel economy. This transmission was known for its adaptability and responsiveness, offering both automatic and manual shift modes.

Driving Characteristics

The S 350 CDI BlueTEC Long delivers a refined and comfortable driving experience. While not as overtly sporty as the higher-powered S-Class variants, the 258 horsepower and substantial 620 Nm (457 lb-ft) of torque provide ample performance for effortless cruising and confident overtaking. The 7G-TRONIC transmission is well-matched to the engine’s characteristics, providing smooth upshifts and downshifts. The long wheelbase contributes to a stable and composed ride, absorbing road imperfections effectively. Compared to the S 500, acceleration is noticeably slower, but the diesel engine’s torque advantage provides strong low-end and mid-range responsiveness. The automatic transmission, while efficient, doesn’t offer the same level of driver engagement as the available manual options in other S-Class models.

Equipment & Trim Levels

The S 350 CDI BlueTEC Long came standard with a comprehensive array of luxury features, befitting its flagship status. These included leather upholstery, wood trim, automatic climate control, a premium sound system, and a host of safety features such as ABS, ESP, and multiple airbags. Optional extras were plentiful, allowing buyers to personalize their vehicles with features like a panoramic sunroof, massaging seats, a rear entertainment system, and advanced driver-assistance systems such as adaptive cruise control and lane-keeping assist. The interior design emphasized elegance and sophistication, with a focus on high-quality materials and meticulous craftsmanship.

Chassis & Braking

The S-Class Long utilized a sophisticated chassis design featuring an independent suspension system all around. The front suspension employed a multi-link setup, while the rear utilized a multi-link independent suspension. Disc brakes were fitted on all four wheels, providing ample stopping power. The braking system was enhanced by ABS (Anti-lock Braking System) and ESP (Electronic Stability Program) for improved safety and control. The suspension was tuned for comfort, prioritizing a smooth and refined ride quality. Stabilizer bars were used front and rear to minimize body roll during cornering.

Market Reception & Comparison

The S 350 CDI BlueTEC Long was well-received by critics and consumers alike. It was praised for its blend of luxury, performance, and fuel efficiency. The diesel engine’s economy was a significant selling point, particularly in Europe where diesel fuel was often cheaper than gasoline. Compared to the S 500, the S 350 CDI offered a more affordable entry point into the S-Class range without sacrificing too much in terms of comfort or refinement. However, some critics noted that the diesel engine’s noise and vibration were slightly more noticeable than those of the gasoline engines. Reliability proved to be generally good, although the complex emissions control systems required periodic maintenance.

Legacy

The OM 642 engine family, including the OM 642.862 found in the S 350 CDI BlueTEC Long, has proven to be remarkably durable and reliable. Well-maintained examples continue to provide years of service. On the used car market, these vehicles represent a compelling value proposition, offering a luxurious and refined driving experience at a relatively affordable price. However, potential buyers should be aware of the maintenance requirements of the BlueTEC emissions system, including the need to replenish AdBlue fluid and periodically replace DPF filters. The S 350 CDI BlueTEC Long remains a testament to Mercedes-Benz’s engineering prowess and its commitment to providing a luxurious and technologically advanced automotive experience.