Mercedes-Benz B-Klasse W245
Weaknesses, engine ratings and buying advice
95–193 PS
1.5-2.0L Benzin
Family Pragmatism
Not Really95–193 PS
1.5-2.0L Benzin
5 weaknesses
Stay Away!Generations
Engine Overview
The Mercedes-Benz B-Klasse W245 is available with 6 engine variants — from 82 to 193 hp. 1 variants had engine changes — the model year is crucial.
The Mercedes-Benz B 180 CDI (Diesel, 109 PS) has the OM640 (2.0L Diesel) — rated: "Be Careful", 6 known weaknesses.
The Mercedes-Benz B 200 CDI (Diesel, 136–140 PS) comes with 3 different engines: OM640 (2005–2012, Be Careful) und OM640 (2005–2012, Be Careful) und OM640 (2005–2012, Be Careful). Pay attention to the model year for the B 200 CDI!
The Mercedes-Benz B 150 (Benziner, 95 PS) has the M266 (1.5-2.0L) — rated: "Stay Away!", 5 known weaknesses.
The Mercedes-Benz B 170 (Benziner, 116 PS) has the M266 (1.5-2.0L) — rated: "Stay Away!", 5 known weaknesses.
The Mercedes-Benz B 200 (Benziner, 136 PS) has the M266 (1.5-2.0L) — rated: "Stay Away!", 5 known weaknesses.
The Mercedes-Benz B 200 Turbo (Benziner, 193 PS) has the M266 (1.5-2.0L) — rated: "Stay Away!", 5 known weaknesses.
Vehicle Weaknesses
| Weakness | Cost | |
|---|---|---|
| Rust on Door Edges, Bonnet and Strut Tops Early rust starts at door lower edges and spreads to bonnet and strut tops. Vehicles only 3 years old already show initial rust. Typical problem of early model years. Symptoms: Rust bubbles at door lower edge, rust under bonnet, blistering at wheel arch edges from 80,000 km | Medium | |
| Rust on lower door edges and bonnet Vehicles before the 2008 facelift show pronounced corrosion on lower door edges, bonnet and strut tower mounts. Mercedes carried out goodwill repairs. Symptoms: Rust bubbles on lower door edges, rust beginning under bonnet edge, paint lifting at seam areas | High |
Alternatives
Known Problems and Issues
A total of 30 weaknesses have been documented for the Mercedes-Benz B-Klasse W245 (2005–2012) — 23 engine-related and 7 vehicle-related. One problem engine: M266 (1.5-2.0L). Typical issues affect Rust, Gearbox, Suspension, HVAC.
B-Klasse (OM640, 2005–2012) — Be Careful: Injectors Leaking — Tar Deposits and Pressure Loss, Timing Chain Rattles — Chain Tensioner Worn, EGR Valve Coked Up and Stuck. Power: 109 PS.
B-Klasse (OM640, 2005–2012) — Be Careful: Injectors Leaking — Tar Deposits and Pressure Loss, Timing Chain Rattles — Chain Tensioner Worn, EGR Valve Coked Up and Stuck. Power: 136–140 PS.
B-Klasse (OM651DE18, 2011–2013) — Be Careful: Piezo Injector Faults (220/250 CDI), Chain Tensioner Failure with Oil Loss, Particulate Filter Blockage with Short-Trip Use. Power: 109 PS.
B-Klasse (OM651DE18, 2011–2019) — Be Careful: Piezo Injector Faults (220/250 CDI), Chain Tensioner Failure with Oil Loss, Particulate Filter Blockage with Short-Trip Use. Power: 136 PS.
B-Klasse (M266, 2005–2012) — Stay Away!: CVT Gearbox Loses Drive, Defective Gearbox Control Unit — Fault Codes P0706 / 0722, CVT Autotronic — Push-Belt and Sensor Wear. Power: 95 PS.
B-Klasse (M266, 2005–2012) — Stay Away!: CVT Gearbox Loses Drive, Defective Gearbox Control Unit — Fault Codes P0706 / 0722, CVT Autotronic — Push-Belt and Sensor Wear. Power: 116 PS.
B-Klasse (M266, 2005–2012) — Stay Away!: CVT Gearbox Loses Drive, Defective Gearbox Control Unit — Fault Codes P0706 / 0722, CVT Autotronic — Push-Belt and Sensor Wear. Power: 136 PS.
B-Klasse (M266, 2005–2012) — Stay Away!: CVT Gearbox Loses Drive, Defective Gearbox Control Unit — Fault Codes P0706 / 0722, CVT Autotronic — Push-Belt and Sensor Wear. Power: 193 PS.
B-Klasse (M270DE16, 2011–2019) — Be Careful: Camshaft Adjuster Solenoid Leaks — Oil in Wiring Harness, Recall — Camshaft Break (Production Defect 2015), Electric Thermostat Failure. Power: 122 PS.
B-Klasse (M270DE16, 2011–2019) — Be Careful: Camshaft Adjuster Solenoid Leaks — Oil in Wiring Harness, Recall — Camshaft Break (Production Defect 2015), Electric Thermostat Failure. Power: 156 PS.
What to watch out for with the Mercedes-Benz B-Klasse? See the detailed listing of all engine and vehicle weaknesses in the sections above.
Frequently Asked Questions
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Last updated: February 2026 · All information without guarantee