2010-2013 Mercedes-Benz G-class Long (W461 facelift ) G 300 CDI Professional V6 (184 Hp) 4MATIC Automatic

Technical Specifications

The Mercedes-Benz G-Class Long (W461), specifically the G 300 CDI Professional V6 with its 184 horsepower engine and automatic transmission, represents a specialized version of the iconic off-road vehicle. Produced between 2010 and 2013, this variant was primarily targeted towards professional and specialist applications, serving as a bridge between the civilian G-Class models and the more utilitarian military versions. It was part of the W461 facelift range, which brought improvements to interior refinement and technology while maintaining the G-Class’s legendary off-road prowess. The extended wheelbase of this version provided increased cargo capacity, making it suitable for tasks requiring substantial equipment or personnel transport.

Powertrain & Engine Architecture

The G 300 CDI Professional’s powertrain centers around the OM 642.975, a 3.0-liter V6 diesel engine. This engine employs a common rail direct injection system, delivering fuel at exceptionally high pressures to optimize combustion efficiency. A variable geometry turbocharger, coupled with an intercooler, further enhances both performance and fuel economy. The engine generates 184 horsepower at 3800 rpm and a robust 400 Nm (295 lb-ft) of torque between 1600 and 2600 rpm. This broad torque curve is particularly beneficial for off-road driving and towing applications. The engine features a double overhead camshaft (DOHC) valvetrain with four valves per cylinder. The engine is mounted longitudinally within the chassis. A 5-speed automatic transmission is paired with the engine, designed for durability and smooth operation. While not the most advanced transmission available at the time, it was well-suited to the G-Class’s intended purpose, providing appropriate gear ratios for both on-road driving and challenging off-road conditions. A diesel particulate filter was incorporated to comply with Euro 5 emission standards.

Driving Characteristics

The G 300 CDI Professional V6 Automatic delivers a distinctive driving experience. The automatic transmission, while offering convenience, does result in a slightly less responsive feel compared to the available manual transmission options. Acceleration is adequate, but the emphasis is clearly on torque delivery rather than outright speed. The 5-speed automatic’s gear ratios are optimized to prioritize low-end power for off-road scenarios. On paved roads, the G-Class exhibits noticeable body roll due to its high center of gravity and traditional suspension design. However, the robust chassis and all-wheel-drive system provide a sense of stability and confidence. The longer wheelbase contributes to a smoother ride compared to the standard-length G-Class, especially on uneven surfaces.

Equipment & Trim Levels

The G 300 CDI Professional trim level prioritized practicality and durability. Standard features typically included air conditioning, power windows, central locking, and a basic audio system. The interior was generally functional, with hard-wearing materials and a focus on usability. Upholstery was commonly a durable fabric, although leather options were available. The dashboard layout was relatively straightforward, with clearly labeled controls. Optional extras could include a sunroof, upgraded audio systems, and auxiliary heating. The extended wheelbase provided significantly more cargo space compared to the standard G-Class, making it ideal for transporting equipment or supplies.

Chassis & Braking

The G-Class chassis is a ladder-frame construction, renowned for its strength and rigidity. The G 300 CDI Professional utilizes a coil spring suspension with rigid axles front and rear, providing substantial wheel articulation for superior off-road capability. The braking system features disc brakes on all four wheels, coupled with an Anti-lock Braking System (ABS) for enhanced safety. The steering system is a recirculating ball type with hydraulic power assistance, offering a direct and precise feel, although it requires more effort than more modern rack-and-pinion systems.

Market Reception & Comparison

The G 300 CDI Professional V6 Automatic was generally well-received by those seeking a capable and durable off-road vehicle. Critics praised its robust construction, impressive towing capacity, and legendary all-terrain performance. However, the automatic transmission was sometimes criticized for being less engaging than the manual option. Compared to the higher-performance G 55 AMG, the G 300 CDI offered significantly better fuel economy and lower running costs. In comparison to the G 320 CDI, the 300 CDI offered a slight reduction in power but maintained comparable torque figures, often at a lower price point. The 300 CDI was positioned as a workhorse, appealing to professionals and those needing a reliable vehicle for demanding conditions.

Legacy

The OM 642 engine family, including the OM 642.975 found in the G 300 CDI, is known for its durability and longevity. While maintenance costs can be higher than those of more common engines, the powertrain is generally reliable when properly maintained. Today, the G 300 CDI Professional V6 Automatic holds a strong position in the used car market, particularly among enthusiasts and those seeking a classic off-road vehicle. Its combination of capability, durability, and iconic styling ensures its continued appeal for years to come. Parts availability remains reasonable, though specialized components may require sourcing from Mercedes-Benz or specialist suppliers.