The Mercedes-Benz B-Class (W246) B 180 CDI with the 7-speed dual-clutch transmission (DCT) was produced from 2013 to 2014. This variant occupied the entry-level position within the W246 B-Class range, offering a fuel-efficient diesel option aimed at buyers prioritizing economy and practicality over outright performance. It was positioned below the more powerful B 200 CDI and B 250 models, and served as an alternative to gasoline-powered B 180 variants. The W246 generation represented a significant step forward for the B-Class, moving it from a compact MPV towards a more conventional, yet spacious, hatchback design.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | B-class |
| Generation | B-class (W246) |
| Type (Engine) | B 180 CDI (109 Hp) DCT |
| Start of production | 2013 |
| End of production | 2014 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 5.1-4.9 l/100 km (46.1 – 48 US mpg, 55.4 – 57.6 UK mpg, 19.6 – 20.4 km/l) |
| Fuel consumption (extra urban) | 4.0-3.7 l/100 km (58.8 – 63.6 US mpg, 70.6 – 76.3 UK mpg, 25 – 27 km/l) |
| Fuel consumption (combined) | 4.4-4.1 l/100 km (53.5 – 57.4 US mpg, 64.2 – 68.9 UK mpg, 22.7 – 24.4 km/l) |
| CO2 emissions | 117-108 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 11.9 sec |
| Acceleration 0 – 62 mph | 11.9 sec |
| Acceleration 0 – 60 mph | 11.3 sec |
| Maximum speed | 190 km/h (118.06 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 13.4 kg/Hp, 74.4 Hp/tonne |
| Weight-to-torque ratio | 5.6 kg/Nm, 177.5 Nm/tonne |
| Power | 109 Hp @ 4000 rpm |
| Power per litre | 74.6 Hp/l |
| Torque | 260 Nm @ 1750-2500 rpm (191.77 lb.-ft. @ 1750-2500 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | OM 607.951 |
| Engine displacement | 1461 cm3 (89.16 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Compression ratio | 15.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 4.5 l (4.76 US qt | 3.96 UK qt) |
| Coolant capacity | 6.3 l (6.66 US qt | 5.54 UK qt) |
| Kerb Weight | 1465 kg (3229.77 lbs.) |
| Max. weight | 2000 kg (4409.25 lbs.) |
| Max load | 535 kg (1179.47 lbs.) |
| Trunk (boot) space – minimum | 488 l (17.23 cu. ft.) |
| Trunk (boot) space – maximum | 1547 l (54.63 cu. ft.) |
| Fuel tank capacity | 50 l (13.21 US gal | 11 UK gal) |
| Length | 4359 mm (171.61 in.) |
| Width | 1786 mm (70.31 in.) |
| Height | 1557 mm (61.3 in.) |
| Wheelbase | 2699 mm (106.26 in.) |
| Front track | 1552 mm (61.1 in.) |
| Rear track | 1549 mm (60.98 in.) |
| Minimum turning circle | 11 m (36.09 ft.) |
| Drivetrain Architecture | Front wheel drive |
| Number of gears | 7 |
| Gearbox type | Automatic transmission G-DCT |
| Front suspension | Independent type McPherson |
| Rear suspension | Trailing arm |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 195/65 R15 |
| Wheel rims size | 15 |
Powertrain & Engine Architecture
The B 180 CDI utilizes the OM607.951 engine, a 1.5-liter inline-four cylinder diesel engine. This engine is part of Mercedes-Benz’s family of compact diesel engines, known for their efficiency and relatively low emissions. It features a turbocharger with an intercooler to boost power output and improve combustion efficiency. The engine employs a common rail direct injection system, delivering fuel directly into the combustion chamber at extremely high pressure for optimized fuel atomization and cleaner burning. The valvetrain consists of four valves per cylinder, enhancing volumetric efficiency. The 7-speed G-DCT (Getriebe Doppelkupplungsgetriebe) dual-clutch transmission provides quick and smooth gear changes, contributing to both performance and fuel economy. This transmission is known for its efficiency and responsiveness compared to traditional automatic transmissions.
Driving Characteristics
The B 180 CDI DCT offers a comfortable and refined driving experience, prioritizing fuel efficiency over sporty performance. With 109 horsepower and 260 Nm (192 lb-ft) of torque, acceleration is adequate for everyday driving, but not particularly brisk. The 0-60 mph time of around 11.3 seconds reflects this. The DCT transmission helps to maximize the available power, providing seamless shifts and keeping the engine in its optimal power band. The gear ratios are tuned for fuel economy, with taller gearing in higher gears. Compared to the more powerful B 200 CDI, the B 180 CDI feels noticeably slower, especially during overtaking maneuvers. However, the B 180 CDI’s lighter weight and efficient engine contribute to superior fuel economy.
Equipment & Trim Levels
The B 180 CDI typically came equipped with standard features such as air conditioning, a multi-function steering wheel, power windows, and a basic audio system. Safety features included ABS, ESP (Electronic Stability Program), and multiple airbags. Optional extras included a panoramic sunroof, upgraded audio systems, navigation, leather upholstery, and parking sensors. The interior generally featured a functional and modern design, with a focus on practicality and usability. Upholstery was typically cloth, with the option of upgrading to leatherette or leather. The dashboard layout was clean and straightforward, with easy-to-read instrumentation.
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 setup provides a comfortable ride quality, absorbing bumps and imperfections in the road effectively. The B 180 CDI is equipped with ventilated disc brakes at the front and solid disc brakes at the rear. ABS (Anti-lock Braking System) is standard, providing enhanced braking performance and stability. The steering is electrically assisted, offering a light and precise feel. The suspension tuning is geared towards comfort rather than sporty handling, resulting in a stable and predictable driving experience.
Market Reception & Comparison
The B 180 CDI was generally well-received by critics as a practical and fuel-efficient option within the B-Class range. It was praised for its comfortable ride, spacious interior, and low running costs. However, some reviewers noted its lack of outright performance compared to higher-powered variants. In terms of fuel economy, the B 180 CDI consistently outperformed the gasoline-powered B 180, making it an attractive choice for drivers covering long distances. Compared to the B 200 CDI, the B 180 CDI offered a lower purchase price but sacrificed some performance. The B 180 CDI appealed to buyers seeking a sensible and economical family car.
Legacy
The OM607.951 engine, found in the B 180 CDI, has proven to be a relatively reliable powertrain when properly maintained. Common issues include diesel particulate filter (DPF) clogging, particularly on vehicles used primarily for short journeys. Regular servicing and the use of high-quality diesel fuel are crucial for ensuring long-term reliability. On the used car market, the B 180 CDI remains a popular choice due to its affordability and fuel efficiency. However, potential buyers should carefully inspect the vehicle’s service history and check for any signs of DPF issues. The W246 B-Class, in general, has established a reputation as a practical and dependable compact hatchback.
