2012-2014 Mercedes-Benz B-class (W246) B 220 CDI (170 Hp) DCT

The Mercedes-Benz B-Class (W246) B 220 CDI, produced from 2012 to 2014, represented a significant offering in the premium compact multi-purpose vehicle (MPV) segment. Positioned as a mid-range trim within the W246 series, it aimed to bridge the gap between more economical versions and the higher-performance models. This variant combined a diesel engine with a dual-clutch transmission (DCT), offering a blend of fuel efficiency and respectable performance. The W246 B-Class, overall, was Mercedes-Benz’s attempt to appeal to a younger demographic seeking a practical yet stylish vehicle, and the B 220 CDI was a key component of that strategy.

Technical Specifications

INTRODUCTION

The W246 generation of the Mercedes-Benz B-Class, launched in 2011, represented a departure from its predecessors, adopting a more contemporary and stylish design. The B 220 CDI, introduced in 2012, was a diesel-powered variant utilizing a 2.1-liter engine paired with a 7-speed dual-clutch transmission. This combination aimed to deliver a balance of performance, fuel economy, and refinement, appealing to buyers seeking a practical and efficient vehicle for daily use. It sat in the middle of the B-Class range, offering more power and a more sophisticated transmission than the entry-level models, but at a lower price point than the more powerful petrol variants.

Powertrain & Engine Architecture

At the heart of the B 220 CDI lies the OM651.930, a 2.143-liter inline-four cylinder diesel engine. This engine is a common rail direct injection diesel, meaning fuel is delivered to the cylinders at extremely high pressure via a common rail system, optimizing combustion efficiency. The engine features a turbocharger with an intercooler, boosting power output and improving torque delivery. The engine produces 170 horsepower at 3400-4000 rpm and a substantial 350 Nm (258 lb-ft) of torque between 1400 and 3400 rpm. This broad torque curve is a hallmark of diesel engines, providing strong pulling power from low engine speeds.

The transmission is a 7G-DCT (7-speed dual-clutch transmission). This transmission offers quicker and smoother gear changes compared to a traditional automatic transmission, contributing to a more engaging driving experience. The DCT utilizes two separate clutches, one for odd-numbered gears and one for even-numbered gears, allowing for pre-selection of the next gear and seamless shifts. This technology also contributes to improved fuel efficiency.

Driving Characteristics

The B 220 CDI with the 7G-DCT offers a comfortable and refined driving experience. Acceleration from 0-60 mph takes approximately 7.9 seconds, which is respectable for a compact MPV. The abundance of low-end torque makes it easy to navigate city traffic and provides ample power for overtaking maneuvers on the highway. The DCT transmission shifts quickly and smoothly, enhancing the overall driving experience. Compared to the manual transmission versions of the B 220 CDI, the DCT offers greater convenience and ease of use, particularly in stop-and-go traffic. However, some drivers may prefer the more direct feel of a manual gearbox. Compared to the more powerful B 250 petrol variant, the B 220 CDI prioritizes fuel economy and torque over outright horsepower.

Equipment & Trim Levels

The B 220 CDI typically came equipped with a generous amount of standard features, including automatic climate control, a multi-function steering wheel, and a high-quality audio system. Interior upholstery was typically a combination of fabric and leatherette, with options for full leather available. Optional extras included a panoramic sunroof, navigation system, parking assist, and various driver assistance systems. The dashboard layout was modern and functional, with a central display screen providing access to vehicle information and entertainment features. Trim levels varied slightly depending on the market, but generally offered a progression of features and luxury.

Chassis & Braking

The W246 B-Class features an independent McPherson strut suspension at the front and a semi-independent trailing arm suspension at the rear. This suspension setup provides a comfortable ride quality while maintaining good handling characteristics. The B 220 CDI is equipped with ventilated disc brakes at the front and solid disc brakes at the rear. Anti-lock braking system (ABS) and electronic stability control (ESC) are standard features, enhancing safety and stability. The steering is electrically assisted, providing a light and precise feel.

Market Reception & Comparison

The B 220 CDI was generally well-received by automotive critics, who praised its fuel efficiency, comfortable ride, and refined powertrain. The DCT transmission was also a highlight, offering smooth and quick gear changes. However, some critics noted that the interior design, while modern, lacked the premium feel of some of its competitors. Compared to other trims in the B-Class lineup, the B 220 CDI offered a compelling balance of performance and economy. It was more affordable than the B 250 petrol variant, while offering more power and a more sophisticated transmission than the lower-spec diesel models.

Legacy

The OM651 engine family, used in the B 220 CDI, is known for its durability and reliability. With proper maintenance, these engines can reliably exceed 200,000 miles. The 7G-DCT transmission is also generally reliable, although regular servicing is essential to ensure smooth operation. On the used car market, the W246 B 220 CDI remains a popular choice for buyers seeking a practical, efficient, and well-equipped compact MPV. Its combination of fuel economy, comfort, and reliability makes it a compelling option in its price range. However, potential buyers should be aware of the potential for diesel particulate filter (DPF) issues, particularly if the vehicle has primarily been used for short journeys.