The Mercedes-Benz B 150, part of the W245 facelift series produced from April 2008 to April 2009, represented an entry-level offering within the second-generation B-Class range. Positioned as a compact multi-purpose vehicle (MPV), the B 150 aimed to provide practical transportation with a focus on fuel efficiency and affordability. It served as a key model in the European market, where compact MPVs were highly popular, offering a more space-efficient alternative to traditional hatchbacks. This variant was distinguished by its 1.5-liter engine paired with Mercedes’ Autotronic continuously variable transmission (CVT).
Technical Specifications
| Brand | Mercedes-Benz |
| Model | B-class |
| Generation | B-class (W245 facelift 2008) |
| Type (Engine) | B 150 (95 Hp) Autotronic |
| Start of production | April, 2008 |
| End of production | April, 2009 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | MPV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 8.5-8.7 l/100 km (27.7 – 27 US mpg, 33.2 – 32.5 UK mpg, 11.8 – 11.5 km/l) |
| Fuel consumption (extra urban) | 6-6.2 l/100 km (39.2 – 37.9 US mpg, 47.1 – 45.6 UK mpg, 16.7 – 16.1 km/l) |
| Fuel consumption (combined) | 6.9-7.1 l/100 km (34.1 – 33.1 US mpg, 40.9 – 39.8 UK mpg, 14.5 – 14.1 km/l) |
| CO2 emissions | 166-171 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 14.2 sec |
| Acceleration 0 – 62 mph | 14.2 sec |
| Acceleration 0 – 60 mph | 13.5 sec |
| Maximum speed | 168 km/h (104.39 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 13.4 kg/Hp, 74.5 Hp/tonne |
| Weight-to-torque ratio | 9.1 kg/Nm, 109.8 Nm/tonne |
| Power | 95 Hp @ 5200 rpm |
| Torque | 140 Nm @ 3500-4000 rpm (103.26 lb.-ft. @ 3500-4000 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | M 266.920 |
| Engine displacement | 1498 cm3 (91.41 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 69.2 mm (2.72 in.) |
| Compression ratio | 11:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | SOHC |
| Engine oil capacity | 5 l (5.28 US qt | 4.4 UK qt) |
| Coolant capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Kerb Weight | 1275 kg (2810.89 lbs.) |
| Max. weight | 1835 kg (4045.48 lbs.) |
| Max load | 560 kg (1234.59 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%) | 1000 kg (2204.62 lbs.) |
| Permitted trailer load without brakes | 645 kg (1421.98 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 | 1603 mm (63.11 in.) |
| Wheelbase | 2778 mm (109.37 in.) |
| Front track | 1556 mm (61.26 in.) |
| Rear track | 1551 mm (61.06 in.) |
| Drag coefficient (Cd) | 0.30 |
| Minimum turning circle | 11.95 m (39.21 ft.) |
| Drivetrain | Front wheel drive |
| Gearbox | automatic transmission Autotronic |
| 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 | 195/65 R15 |
| Wheel rims size | 6J x 15 |
Powertrain & Engine Architecture
The B 150 was powered by the Mercedes-Benz M 266.920 engine, a 1.5-liter inline-four cylinder gasoline engine. This engine, part of the M 266 family, featured multi-port fuel injection and a single overhead camshaft (SOHC) valvetrain. The engine produced 95 horsepower at 5200 rpm and 140 Nm (103 lb-ft) of torque between 3500 and 4000 rpm. The Autotronic transmission, a continuously variable transmission (CVT), was specifically chosen for its smooth operation and fuel efficiency. Unlike traditional automatic transmissions with fixed gear ratios, the Autotronic offered a seamless range of ratios, allowing the engine to operate at its most efficient point. This transmission was known for its relatively slow response compared to more modern CVTs or traditional automatics.
Driving Characteristics
The B 150’s driving experience was characterized by its relaxed and comfortable nature. The 95 hp engine and CVT combination resulted in modest acceleration – 0 to 60 mph took approximately 13.5 seconds. The CVT’s continuously variable ratios meant that the engine often remained at a constant rpm during acceleration, which some drivers found unusual compared to the stepped shifts of a conventional automatic. While not sporty, the B 150 provided adequate power for everyday driving and highway cruising. The CVT prioritized fuel economy over performance, making it a suitable choice for drivers prioritizing efficiency. Compared to the more powerful B 200 models, the B 150 offered a significantly more economical driving experience, albeit at the expense of outright speed.
Equipment & Trim Levels
The B 150 typically came equipped with a reasonable level of standard features, including air conditioning, power windows, central locking, and an audio system. Interior upholstery was generally cloth, with options for upgraded materials available. Dashboard design was functional and straightforward, reflecting the B-Class’s focus on practicality. Common optional extras included alloy wheels, a sunroof, and a more advanced audio system. Safety features such as ABS and multiple airbags were standard.
Chassis & Braking
The B 150 utilized a McPherson strut front suspension and a coil spring rear suspension. Front brakes were ventilated discs, while rear brakes were solid discs. The suspension setup was tuned for comfort, providing a relatively smooth ride. The relatively light weight of the B 150, at 1275 kg (2810.89 lbs), helped to compensate for the modest engine power. Stabilizer bars were included on both axles to reduce body roll during cornering.
Market Reception & Comparison
The B 150 was generally well-received as an affordable and practical MPV. Critics praised its fuel efficiency and spacious interior, but noted its lack of performance. Compared to the B 200, which offered a more powerful engine, the B 150 was significantly more economical to run. However, the B 200 provided a more engaging driving experience. The B 150’s CVT transmission was sometimes criticized for its slow response and “rubber band” feel. In terms of reliability, the M 266 engine proved to be generally robust, although the Autotronic transmission could be prone to issues if not properly maintained.
Legacy
The B 150, while not the most exciting variant of the W245 B-Class, remains a practical and affordable option in the used car market. The M 266 engine is known for its durability, and with regular maintenance, can provide many years of reliable service. The Autotronic transmission, however, requires careful attention to fluid changes to prevent premature failure. Today, the B 150 appeals to buyers seeking a spacious, economical, and relatively reliable MPV for everyday use. Its compact size and fuel efficiency make it a suitable choice for urban driving, while its spacious interior provides ample room for passengers and cargo.
