2009-2010 Mercedes-Benz R-class Long (V251) R 300 V6 (231 Hp) G-TRONIC

The Mercedes-Benz R-Class Long (V251) R 300 V6 G-TRONIC, produced from 2009 to 2010, represented a unique offering in the luxury vehicle segment. Positioned as a spacious, six or seven-seat vehicle, the R-Class aimed to blend the practicality of a minivan with the prestige and driving experience associated with Mercedes-Benz. The “Long” designation indicated an extended wheelbase version, primarily aimed at markets desiring increased rear passenger space. The R 300 V6 G-TRONIC variant, equipped with a 3.0-liter V6 engine and a seven-speed automatic transmission, served as a mid-range option within the R-Class lineup, offering a balance between performance and fuel efficiency. It was largely sold in Europe and other international markets, with limited availability in the United States.

Technical Specifications

INTRODUCTION

The R 300 V6 G-TRONIC variant of the V251 R-Class Long was introduced in 2009 as part of a mid-cycle refresh for the model. Built on the Mercedes-Benz 1HX0/A3 platform, which also underpinned vehicles like the W211 E-Class and W221 S-Class, the R-Class aimed to offer a more luxurious and refined alternative to traditional minivans and SUVs. The “Long” wheelbase version, measuring 5.16 meters (203 inches) in length, provided significantly more legroom for second-row passengers, making it particularly appealing to families or those who frequently transported passengers. The R 300 V6 G-TRONIC occupied a middle ground in the R-Class range, positioned above the entry-level R 280 CDI diesel and below the more powerful R 350 and R 500 gasoline models.

Powertrain & Engine Architecture

The heart of the R 300 V6 G-TRONIC is the M 272.945 3.0-liter naturally aspirated V6 engine. This engine, a member of Mercedes-Benz’s M272 family, features a 60-degree V-angle and utilizes a magnesium block for weight reduction. It employs a multi-port fuel injection system and three valves per cylinder (two intake, one exhaust). The engine produces 231 horsepower at 6,000 rpm and 300 Nm (221 lb-ft) of torque between 2,500 and 5,000 rpm. The engine’s characteristics prioritize smooth power delivery over outright performance. The “G-TRONIC” designation refers to the 7G-TRONIC seven-speed automatic transmission. This transmission, known for its smooth and quick shifts, contributes to both fuel efficiency and a comfortable driving experience. It features a torque converter lock-up clutch to minimize slippage and improve efficiency. The transmission is electronically controlled and offers selectable driving modes.

Driving Characteristics

The R 300 V6 G-TRONIC delivers a comfortable and refined driving experience, prioritizing smoothness and quietness over sporty handling. Acceleration from 0 to 100 km/h (0-62 mph) takes approximately 9.7 seconds, which is adequate for everyday driving but not particularly brisk. The seven-speed automatic transmission is well-matched to the engine, providing seamless gear changes and keeping the engine within its optimal power band. Compared to the more powerful R 350 or R 500 models, the R 300 feels less eager to accelerate, but it offers a more relaxed and fuel-efficient driving experience. The long wheelbase contributes to a stable ride, but it also makes the vehicle feel large and somewhat cumbersome in tight spaces. The rear-wheel-drive configuration provides a balanced feel, although it doesn’t offer the all-weather capability of the available 4MATIC all-wheel-drive system.

Equipment & Trim Levels

The R 300 V6 G-TRONIC typically came well-equipped with standard features such as automatic climate control, power-adjustable front seats, a premium audio system, and leather upholstery. Safety features included ABS, electronic stability control, and multiple airbags. Optional extras included a panoramic sunroof, navigation system, rear-seat entertainment system, and adaptive cruise control. Interior trim levels varied depending on the market and individual customer preferences, with options ranging from wood veneers to aluminum accents. The R-Class generally offered a high level of interior refinement and build quality, consistent with Mercedes-Benz’s reputation.

Chassis & Braking

The R-Class Long featured a double wishbone front suspension and an independent multi-link rear suspension with a stabilizer bar. This suspension setup provided a comfortable ride and good handling characteristics. The R 300 V6 G-TRONIC was equipped with ventilated disc brakes at the front and solid disc brakes at the rear. The braking system was assisted by ABS (Anti-lock Braking System) and electronic brake-force distribution. The steering was a rack-and-pinion system with hydraulic power assistance, providing precise and responsive steering feel.

Market Reception & Comparison

The Mercedes-Benz R-Class, in general, received mixed reviews from automotive critics. While praised for its spacious interior, luxurious appointments, and comfortable ride, it was often criticized for its unconventional styling and high price tag. The R 300 V6 G-TRONIC was seen as a sensible choice for buyers prioritizing fuel efficiency and a smooth driving experience. Compared to the R 280 CDI, the R 300 offered slightly more power and a more refined engine. However, the R 280 CDI typically achieved better fuel economy. Compared to the R 350 and R 500, the R 300 was less powerful but more affordable and fuel-efficient.

Legacy

The Mercedes-Benz R-Class was discontinued after the 2010 model year due to slow sales. While it didn’t achieve mainstream success, the R-Class remains a unique and interesting vehicle. The M 272 V6 engine used in the R 300 V6 G-TRONIC is generally considered to be a reliable and durable engine, although regular maintenance is essential. On the used car market, the R 300 V6 G-TRONIC can be found at relatively affordable prices, making it an attractive option for buyers seeking a spacious and luxurious vehicle. However, potential buyers should be aware of the potential for higher maintenance costs associated with a complex vehicle like the R-Class.