The Mercedes-Benz B-Class W245 facelift B 180 CDI, produced from April 2008 to April 2010, represented an entry-level diesel option within the second generation of the B-Class compact multi-purpose vehicle (MPV). Positioned as a fuel-efficient and practical choice, it catered to buyers seeking a comfortable and versatile vehicle for everyday use. This variant utilized a 2.0-liter turbocharged diesel engine paired with a six-speed manual transmission, offering a balance between economy and usability. The W245 B-Class, as a whole, aimed to bridge the gap between a traditional hatchback and a small minivan, offering a higher seating position and increased cargo flexibility compared to conventional hatchbacks.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | B-Class |
| Generation | B-Class (W245 facelift 2008) |
| Type (Engine) | B 180 CDI (109 Hp) |
| Start of production | April, 2008 |
| End of production | April, 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | MPV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 6.4-6.6 l/100 km (36.8 – 35.6 US mpg, 44.1 – 42.8 UK mpg, 15.6 – 15.2 km/l) |
| Fuel consumption (extra urban) | 4.4-4.6 l/100 km (53.5 – 51.1 US mpg, 64.2 – 61.4 UK mpg, 22.7 – 21.7 km/l) |
| Fuel consumption (combined) | 5.2-5.4 l/100 km (45.2 – 43.6 US mpg, 54.3 – 52.3 UK mpg, 19.2 – 18.5 km/l) |
| CO2 emissions | 137-140 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 11.3 sec |
| Acceleration 0 – 62 mph | 11.3 sec |
| Acceleration 0 – 60 mph | 10.7 sec |
| Maximum speed | 183 km/h (113.71 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 12.5 kg/Hp, 80.1 Hp/tonne |
| Weight-to-torque ratio | 5.4 kg/Nm, 183.8 Nm/tonne |
| Power | 109 Hp @ 4200 rpm |
| Torque | 250 Nm @ 1600-2600 rpm (184.39 lb.-ft. @ 1600-2600 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | OM 640.940 |
| Engine displacement | 1991 cm3 (121.5 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 92 mm (3.62 in.) |
| Compression ratio | 18:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 5.4 l (5.71 US qt | 4.75 UK qt) |
| Coolant capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Kerb Weight | 1360 kg (2998.29 lbs.) |
| Max. weight | 1880 kg (4144.69 lbs.) |
| Max load | 520 kg (1146.4 lbs.) |
| Trunk (boot) space – minimum | 544 l (19.21 cu. ft.) |
| Trunk (boot) space – maximum | 2245 l (79.28 cu. ft.) |
| Fuel tank capacity | 54 l (14.27 US gal | 11.88 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Permitted trailer load with brakes (12%) | 1500 kg (3306.93 lbs.) |
| Permitted trailer load without brakes | 715 kg (1576.31 lbs.) |
| Permitted towbar download | 75 kg (165.35 lbs.) |
| Length | 4273 mm (168.23 in.) |
| Width | 1777 mm (69.96 in.) |
| Width including mirrors | 2035 mm (80.12 in.) |
| Height | 1604 mm (63.15 in.) |
| Wheelbase | 2778 mm (109.37 in.) |
| Front track | 1552 mm (61.1 in.) |
| Rear track | 1547 mm (60.91 in.) |
| Drag coefficient (Cd) | 0.30 |
| Minimum turning circle | 11.95 m (39.21 ft.) |
| Drivetrain | Front wheel drive |
| Number of gears | 6 |
| Gearbox type | Manual transmission |
| Front suspension | Independent type McPherson, Transverse stabilizer |
| Rear suspension | Transverse stabilizer, Coil spring |
| 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 | 205/55 R16 |
| Wheel rims size | 6J x 16 |
Powertrain & Engine Architecture
The B 180 CDI was powered by the OM 640.940, a 1.991-liter inline-four cylinder diesel engine. This engine was a common sight in various Mercedes-Benz compact models of the era. It featured a turbocharger with an intercooler to boost power and efficiency. The engine utilized a second-generation common rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. The DOHC (Double Overhead Camshaft) valvetrain, with four valves per cylinder, further enhanced breathing and performance. The six-speed manual transmission provided precise gear changes and contributed to the vehicle’s fuel economy. The engine’s design prioritized low-end torque, making it well-suited for everyday driving conditions.
Driving Characteristics
The B 180 CDI with the manual transmission offered a practical and economical driving experience. While not particularly sporty, the 109 horsepower and 250 Nm (184 lb-ft) of torque provided adequate performance for most situations. Acceleration from 0 to 60 mph took around 10.7 seconds, and the top speed was 113.71 mph. The manual gearbox allowed for greater driver control and contributed to the fuel efficiency. Compared to higher-output versions like the B 200 CDI, the B 180 CDI felt less responsive, particularly during overtaking maneuvers. However, the lower power output also meant reduced stress on the engine components, potentially leading to greater long-term reliability. The gear ratios were tuned for fuel economy, resulting in a slightly less engaging driving experience than the more powerful variants.
Equipment & Trim Levels
The B 180 CDI typically came equipped with a reasonable level of standard features. These included air conditioning, power windows, central locking, and an audio system. Interior upholstery was generally cloth, with options for leather upgrades. The dashboard layout was functional and straightforward, prioritizing usability over luxury. Optional extras included a panoramic sunroof, parking sensors, and a more advanced audio system with navigation. Trim levels were relatively simple, with the B 180 CDI representing the entry point into the B-Class range. Higher trims, such as the B 200 CDI, offered more luxurious appointments and additional features.
Chassis & Braking
The W245 B-Class featured an independent McPherson strut suspension at the front and a semi-independent torsion beam suspension at the rear. This setup provided a comfortable ride quality, although it wasn’t particularly sporty. The front brakes were ventilated discs, while the rear brakes were solid discs. ABS (Anti-lock Braking System) was standard, enhancing safety during emergency braking. The suspension was tuned to prioritize comfort and stability, rather than aggressive handling. The relatively lightweight construction of the B-Class helped to keep the vehicle nimble and responsive.
Market Reception & Comparison
The B 180 CDI was generally well-received by critics as a practical and fuel-efficient option. Its low running costs and spacious interior made it an attractive choice for families and commuters. However, some reviewers noted that the engine lacked the punch of the more powerful variants. Compared to the B 200 CDI, the B 180 CDI offered significantly better fuel economy but at the expense of performance. The B 180 CDI also represented a more affordable entry point into the B-Class range, making it accessible to a wider range of buyers. Its reliability was generally considered good, although regular maintenance was essential to ensure long-term durability.
Legacy
The OM 640 engine family, including the OM 640.940 found in the B 180 CDI, has a reputation for being relatively robust and long-lasting, provided it receives regular maintenance. Common issues include turbocharger wear and potential problems with the fuel injection system. On the used car market, the B 180 CDI remains a relatively affordable option, appealing to buyers seeking a practical and economical vehicle. Its fuel efficiency and spacious interior continue to be attractive features. However, potential buyers should be aware of the age of the vehicle and the potential for maintenance issues associated with older diesel engines. The W245 B-Class, as a whole, helped to establish Mercedes-Benz as a player in the compact MPV segment, paving the way for future generations of the B-Class.
