Mercedes-Benz B-Klasse W246
Weaknesses, engine ratings and buying advice
The W246 brought the B-Class into the modern era — front-wheel drive instead of sandwich floor, modern turbo engines, and a significantly more upscale interior. The jump from the W245 is enormous in both driving dynamics and perceived quality.
Among petrols, the M270DE16 1.6L turbo at 75 to 115 kW is the bread-and-butter engine. Reliable, efficient, unremarkable. The larger M270DE20 2.0L at 135 to 155 kW in B 220 and B 250 offers noticeably more torque. Both M270 variants share a known issue: the timing chain stretches past 50,000 miles, and the exhaust-side chain tensioner is undersized. Cost: $1,700–2,800. Act immediately if you hear rattling on cold starts.
The diesel range is broad: OM607 1.5L (66–80 kW) as entry-level, OM651DE18 1.8L (80–100 kW) as mid-range, and OM651DE22 2.1L (125–130 kW) as the top version. The OM651 family is fundamentally solid, but timing chain wear applies here too. OM607 injectors become a concern past 75,000 miles.
The 7G-DCT dual-clutch is the standard automatic — largely reliable, but judder at low speeds occurs. A software update often helps. Rust is not a major concern on the W246.
Test-drive checklist: Cold start and listen for chain rattle for 30 seconds. Test DCT in roundabouts and parking for judder. Run A/C at full blast — condenser leaks occur.
2026 market: Between $8,800 and $19,800 for examples with 40,000–80,000 miles.
Insider pick: B 200 (M270DE16, 115 kW) with manual gearbox — enough power without DCT risk.
211 PS
B 250 · Benzin
Quickest Van, Not a Sports Car
Decent109–163 PS
1.3L Turbo Benzin
4 weaknesses
Good Choice120–204 PS
2.1L Diesel Diesel
7 weaknesses
Stay Away!Generations
Engine Overview
The Mercedes-Benz B-Klasse W246 is available with 12 engine variants — from 75 to 286 hp.
Renault-based small diesel (K9K base). Economical but with limited power reserves. Mercedes quotes a 200,000 km timing belt interval — Renault specifies 120,000 km for the same engine, and Continental recommends a maximum 5 years from belt production date. Interference engine: a belt snap means immediate total engine loss. EGR valve and DPF are the classic casualties of short-trip use. Plan occasional motorway runs to allow DPF regeneration. Check injectors for coking if used mainly in city traffic. Overall a solid unit, but the timing belt is the decisive purchase criterion — verify service history and belt age before buying.
- !! Timing belt instead of chain -- maintenance obligation from 120,000 km
The Renault K9K-based OM607 uses a timing belt that must be replaced every 120,000 km or 6 years. Neglecting the change leads to snapping and severe engine damage.
Symptoms: No noticeable warning before snap -- sudden failure with no advance notice if change is overdue - !! Timing belt interference engine -- total loss risk from 120,000 km
The OM607 is an interference engine with a timing belt (Renault K9K). Mercedes specifies 200,000 km; Renault recommends 120,000 km for the same engine. If the belt snaps, pistons meet valves -- immediate engine destruction.
Symptoms: Usually no warning before snap; sometimes faint squealing or rattling on cold start - !! Injector failure K9K base from 100,000 km
The Renault-based K9K diesel shows known injector weaknesses. Defective injectors cause poor combustion, increased soot production and drastically shorten DPF regeneration intervals.
Symptoms: Rough idle, power loss, black smoke, frequent DPF regeneration, fault codes for individual cylinders
+ 3 more engine weaknesses + vehicle weaknesses
Smaller 1.8-litre variant of the OM651 with identical architecture. Same timing chain issues as the 2.1-litre: simplex chain stretches from 130,000 km, chain tensioner seal can leak — oil pressure drop and potential engine damage. Piezo injectors in the 220 CDI variant are notoriously failure-prone; Mercedes switched to solenoid injectors during production. EGR valve and oil cooler seals are typical wear items from 150,000 km. DPF regeneration incomplete with short-trip driving — monitor for oil dilution.
- !! Piezo Injector Faults (220/250 CDI) from 80,000 km
Quality issues with Delphi piezo injectors in the 220 CDI and 250 CDI: injectors fail prematurely. A service action replaced piezo injectors with solenoid injectors free of charge.
Symptoms: Strong vibrations under acceleration, rough running, elevated fuel consumption, exhaust smoke - !! Chain Tensioner Failure with Oil Loss from 120,000 km
The OM651 chain tensioner can fail and allow engine oil to escape. Mainly affects vehicles built February–November 2014 (recall). Simplex roller chain increases wear risk.
Symptoms: Light rattling on cold start from the rear of the engine, oil loss, engine warning light - !! Particulate Filter Blockage with Short-Trip Use from 100,000 km
The DPF on the OM651DE18 does not regenerate completely during pure short-trip driving and blocks. A motorway run at least every 2 weeks is required.
Symptoms: DPF warning light, power reduction, engine oil diluted by unburnt fuel
+ 2 more engine weaknesses + vehicle weaknesses
Renault-based small diesel (K9K base). Economical but with limited power reserves. Mercedes quotes a 200,000 km timing belt interval — Renault specifies 120,000 km for the same engine, and Continental recommends a maximum 5 years from belt production date. Interference engine: a belt snap means immediate total engine loss. EGR valve and DPF are the classic casualties of short-trip use. Plan occasional motorway runs to allow DPF regeneration. Check injectors for coking if used mainly in city traffic. Overall a solid unit, but the timing belt is the decisive purchase criterion — verify service history and belt age before buying.
- !! Timing belt instead of chain -- maintenance obligation from 120,000 km
The Renault K9K-based OM607 uses a timing belt that must be replaced every 120,000 km or 6 years. Neglecting the change leads to snapping and severe engine damage.
Symptoms: No noticeable warning before snap -- sudden failure with no advance notice if change is overdue - !! Timing belt interference engine -- total loss risk from 120,000 km
The OM607 is an interference engine with a timing belt (Renault K9K). Mercedes specifies 200,000 km; Renault recommends 120,000 km for the same engine. If the belt snaps, pistons meet valves -- immediate engine destruction.
Symptoms: Usually no warning before snap; sometimes faint squealing or rattling on cold start - !! Injector failure K9K base from 100,000 km
The Renault-based K9K diesel shows known injector weaknesses. Defective injectors cause poor combustion, increased soot production and drastically shorten DPF regeneration intervals.
Symptoms: Rough idle, power loss, black smoke, frequent DPF regeneration, fault codes for individual cylinders
+ 3 more engine weaknesses + vehicle weaknesses
Smaller 1.8-litre variant of the OM651 with identical architecture. Same timing chain issues as the 2.1-litre: simplex chain stretches from 130,000 km, chain tensioner seal can leak — oil pressure drop and potential engine damage. Piezo injectors in the 220 CDI variant are notoriously failure-prone; Mercedes switched to solenoid injectors during production. EGR valve and oil cooler seals are typical wear items from 150,000 km. DPF regeneration incomplete with short-trip driving — monitor for oil dilution.
- !! Piezo Injector Faults (220/250 CDI) from 80,000 km
Quality issues with Delphi piezo injectors in the 220 CDI and 250 CDI: injectors fail prematurely. A service action replaced piezo injectors with solenoid injectors free of charge.
Symptoms: Strong vibrations under acceleration, rough running, elevated fuel consumption, exhaust smoke - !! Chain Tensioner Failure with Oil Loss from 120,000 km
The OM651 chain tensioner can fail and allow engine oil to escape. Mainly affects vehicles built February–November 2014 (recall). Simplex roller chain increases wear risk.
Symptoms: Light rattling on cold start from the rear of the engine, oil loss, engine warning light - !! Particulate Filter Blockage with Short-Trip Use from 100,000 km
The DPF on the OM651DE18 does not regenerate completely during pure short-trip driving and blocks. A motorway run at least every 2 weeks is required.
Symptoms: DPF warning light, power reduction, engine oil diluted by unburnt fuel
+ 2 more engine weaknesses + vehicle weaknesses
Most widespread Mercedes four-cylinder diesel, aluminium block with steel liners. Simplex timing chain sits at the rear of the gearbox and stretches from 120,000 km — chain tensioner recall covered 100,000+ vehicles in Germany (February–November 2014 production). Engine was part of the Mercedes emissions scandal: illegal thermal window defeat device; recall software in some vehicles actually worsened NOx values. Piezo injectors in the 250 CDI were never updated — remains an ongoing risk. Well-maintained examples with solenoid injectors and short oil-change intervals can reach 400,000 km.
- !! Chain Tensioner Seal Leaking — Recall
Over 100,000 vehicles recalled: the chain tensioner seal leaks, allowing engine oil to drip onto the exhaust system and potentially ignite.
Symptoms: Dropping oil level, oil smell from engine bay, oily deposits under the vehicle, possible oil fire - !! Timing Chain Stretch (Simplex Chain) from 150,000 km
The OM651 uses a simplex timing chain. With short-trip driving and overdue oil change intervals the chain stretches.
Symptoms: Light rattling noise on cold start from the rear of the engine, no fault code stored - !! Piezo Injector Faults from 80,000 km
Same Delphi piezo injector problems as in the DE18: 220 CDI and 250 CDI variants affected. Mercedes replaced them with solenoid injectors as part of a service action.
Symptoms: Vibrations and rough running especially under acceleration, elevated fuel consumption
+ 4 more engine weaknesses + vehicle weaknesses
Most widespread Mercedes four-cylinder diesel, aluminium block with steel liners. Simplex timing chain sits at the rear of the gearbox and stretches from 120,000 km — chain tensioner recall covered 100,000+ vehicles in Germany (February–November 2014 production). Engine was part of the Mercedes emissions scandal: illegal thermal window defeat device; recall software in some vehicles actually worsened NOx values. Piezo injectors in the 250 CDI were never updated — remains an ongoing risk. Well-maintained examples with solenoid injectors and short oil-change intervals can reach 400,000 km.
- !! Chain Tensioner Seal Leaking — Recall
Over 100,000 vehicles recalled: the chain tensioner seal leaks, allowing engine oil to drip onto the exhaust system and potentially ignite.
Symptoms: Dropping oil level, oil smell from engine bay, oily deposits under the vehicle, possible oil fire - !! Timing Chain Stretch (Simplex Chain) from 150,000 km
The OM651 uses a simplex timing chain. With short-trip driving and overdue oil change intervals the chain stretches.
Symptoms: Light rattling noise on cold start from the rear of the engine, no fault code stored - !! Piezo Injector Faults from 80,000 km
Same Delphi piezo injector problems as in the DE18: 220 CDI and 250 CDI variants affected. Mercedes replaced them with solenoid injectors as part of a service action.
Symptoms: Vibrations and rough running especially under acceleration, elevated fuel consumption
+ 4 more engine weaknesses + vehicle weaknesses
First four-cylinder turbo of the new compact architecture, transversely mounted in the W176/W246 generation. The electronically controlled thermostat (Y133) is one of the most common failure points: failure without warning, coolant temperature swings uncontrolled. Timing chain stretch from around 80,000 km — especially on short-trip use. Camshaft solenoids (Y49) leak oil into the wiring harness, causing sporadic misfires and ECU faults. Recommendation: oil changes every 10,000 km instead of Longlife intervals.
- !! Camshaft Adjuster Solenoid Leaks — Oil in Wiring Harness from 90,000 km
The sealing ring on the camshaft adjuster solenoid fails. Oil creeps by capillary action through the wiring harness and destroys lambda sensors and the ECU. Repair €1,700–€4,000.
Symptoms: Lambda sensor fault codes, engine stumbling, CEL. In later stages multiple electrical faults simultaneously, ECU coated with oil - !! Recall — Camshaft Break (Production Defect 2015)
M270 engines with manufacturing date July–September 2015 have a defective weld seam on the camshaft lobe. Camshaft can break → engine damage. Recall with free replacement.
Symptoms: Sudden engine noise, power loss up to engine stall. Only vehicles with production date July–September 2015 affected - !! Electric Thermostat Failure from 90,000 km
The electrically-controlled thermostat on the M270 fails frequently and is difficult to access at the rear of the engine. Replacement costs 800–1,300 EUR at Mercedes workshops.
Symptoms: Engine does not reach operating temperature of 80°C, coolant temperature fluctuates, fault code P0128
+ 3 more engine weaknesses + vehicle weaknesses
First four-cylinder turbo of the new compact architecture, transversely mounted in the W176/W246 generation. The electronically controlled thermostat (Y133) is one of the most common failure points: failure without warning, coolant temperature swings uncontrolled. Timing chain stretch from around 80,000 km — especially on short-trip use. Camshaft solenoids (Y49) leak oil into the wiring harness, causing sporadic misfires and ECU faults. Recommendation: oil changes every 10,000 km instead of Longlife intervals.
- !! Camshaft Adjuster Solenoid Leaks — Oil in Wiring Harness from 90,000 km
The sealing ring on the camshaft adjuster solenoid fails. Oil creeps by capillary action through the wiring harness and destroys lambda sensors and the ECU. Repair €1,700–€4,000.
Symptoms: Lambda sensor fault codes, engine stumbling, CEL. In later stages multiple electrical faults simultaneously, ECU coated with oil - !! Recall — Camshaft Break (Production Defect 2015)
M270 engines with manufacturing date July–September 2015 have a defective weld seam on the camshaft lobe. Camshaft can break → engine damage. Recall with free replacement.
Symptoms: Sudden engine noise, power loss up to engine stall. Only vehicles with production date July–September 2015 affected - !! Electric Thermostat Failure from 90,000 km
The electrically-controlled thermostat on the M270 fails frequently and is difficult to access at the rear of the engine. Replacement costs 800–1,300 EUR at Mercedes workshops.
Symptoms: Engine does not reach operating temperature of 80°C, coolant temperature fluctuates, fault code P0128
+ 3 more engine weaknesses + vehicle weaknesses
First four-cylinder turbo of the new compact architecture, transversely mounted in the W176/W246 generation. The electronically controlled thermostat (Y133) is one of the most common failure points: failure without warning, coolant temperature swings uncontrolled. Timing chain stretch from around 80,000 km — especially on short-trip use. Camshaft solenoids (Y49) leak oil into the wiring harness, causing sporadic misfires and ECU faults. Recommendation: oil changes every 10,000 km instead of Longlife intervals.
- !! Camshaft Adjuster Solenoid Leaks — Oil in Wiring Harness from 90,000 km
The sealing ring on the camshaft adjuster solenoid fails. Oil creeps by capillary action through the wiring harness and destroys lambda sensors and the ECU. Repair €1,700–€4,000.
Symptoms: Lambda sensor fault codes, engine stumbling, CEL. In later stages multiple electrical faults simultaneously, ECU coated with oil - !! Recall — Camshaft Break (Production Defect 2015)
M270 engines with manufacturing date July–September 2015 have a defective weld seam on the camshaft lobe. Camshaft can break → engine damage. Recall with free replacement.
Symptoms: Sudden engine noise, power loss up to engine stall. Only vehicles with production date July–September 2015 affected - !! Electric Thermostat Failure from 90,000 km
The electrically-controlled thermostat on the M270 fails frequently and is difficult to access at the rear of the engine. Replacement costs 800–1,300 EUR at Mercedes workshops.
Symptoms: Engine does not reach operating temperature of 80°C, coolant temperature fluctuates, fault code P0128
+ 3 more engine weaknesses + vehicle weaknesses
First four-cylinder turbo of the new compact architecture, transversely mounted in the W176/W246 generation. The electronically controlled thermostat (Y133) is one of the most common failure points: failure without warning, coolant temperature swings uncontrolled. Timing chain stretch from around 80,000 km — especially on short-trip use. Camshaft solenoids (Y49) leak oil into the wiring harness, causing sporadic misfires and ECU faults. Recommendation: oil changes every 10,000 km instead of Longlife intervals.
- !! Camshaft Adjuster Solenoid Leaks — Oil in Wiring Harness from 90,000 km
The sealing ring on the camshaft adjuster solenoid fails. Oil creeps by capillary action through the wiring harness and destroys lambda sensors and the ECU. Repair €1,700–€4,000.
Symptoms: Lambda sensor fault codes, engine stumbling, CEL. In later stages multiple electrical faults simultaneously, ECU coated with oil - !! Recall — Camshaft Break (Production Defect 2015)
M270 engines with manufacturing date July–September 2015 have a defective weld seam on the camshaft lobe. Camshaft can break → engine damage. Recall with free replacement.
Symptoms: Sudden engine noise, power loss up to engine stall. Only vehicles with production date July–September 2015 affected - !! Electric Thermostat Failure from 90,000 km
The electrically-controlled thermostat on the M270 fails frequently and is difficult to access at the rear of the engine. Replacement costs 800–1,300 EUR at Mercedes workshops.
Symptoms: Engine does not reach operating temperature of 80°C, coolant temperature fluctuates, fault code P0128
+ 3 more engine weaknesses + vehicle weaknesses
More powerful 2.0L variant of the M270, power range 156–211 PS depending on application. Shares all weaknesses of the 1.6L version: electric thermostat, wiring harness oil contamination via camshaft solenoids, and timing chain stretch. Higher-stressed variants additionally show moderate oil consumption from worn piston rings. Verify camshaft oil feed recall status (production before Feb 2014). Cap oil change intervals at 10,000 km — Longlife intervals significantly accelerate chain wear.
- !! Camshaft Adjuster Solenoid Leaks — Oil in Wiring Harness from 90,000 km
A leaking camshaft adjuster solenoid allows oil to migrate into the wiring harness. Lambda sensors die first, then the engine ECU. Well-known failure pattern on all M270 variants.
Symptoms: Lambda fault codes, rough running, CEL. Oil smell in engine bay. In later stages multiple electrical faults - !! Recall — Camshaft Break (Production Defect 2015)
M270DE20 engines with manufacturing date July–September 2015: defective weld seam on the camshaft lobe leads to fracture and engine damage. Recall with free replacement.
Symptoms: Metallic noises from engine bay, power loss, in worst case engine stall - !! Electric Thermostat Failure from 90,000 km
Identical issue to the M270DE16: electrically-controlled thermostat at the rear of the engine fails prematurely. Difficult removal drives workshop costs to 700–1,300 EUR.
Symptoms: Engine runs permanently below operating temperature, coolant temperature fluctuations, fault code P0128
+ 3 more engine weaknesses + vehicle weaknesses
More powerful 2.0L variant of the M270, power range 156–211 PS depending on application. Shares all weaknesses of the 1.6L version: electric thermostat, wiring harness oil contamination via camshaft solenoids, and timing chain stretch. Higher-stressed variants additionally show moderate oil consumption from worn piston rings. Verify camshaft oil feed recall status (production before Feb 2014). Cap oil change intervals at 10,000 km — Longlife intervals significantly accelerate chain wear.
- !! Camshaft Adjuster Solenoid Leaks — Oil in Wiring Harness from 90,000 km
A leaking camshaft adjuster solenoid allows oil to migrate into the wiring harness. Lambda sensors die first, then the engine ECU. Well-known failure pattern on all M270 variants.
Symptoms: Lambda fault codes, rough running, CEL. Oil smell in engine bay. In later stages multiple electrical faults - !! Recall — Camshaft Break (Production Defect 2015)
M270DE20 engines with manufacturing date July–September 2015: defective weld seam on the camshaft lobe leads to fracture and engine damage. Recall with free replacement.
Symptoms: Metallic noises from engine bay, power loss, in worst case engine stall - !! Electric Thermostat Failure from 90,000 km
Identical issue to the M270DE16: electrically-controlled thermostat at the rear of the engine fails prematurely. Difficult removal drives workshop costs to 700–1,300 EUR.
Symptoms: Engine runs permanently below operating temperature, coolant temperature fluctuations, fault code P0128
+ 3 more engine weaknesses + vehicle weaknesses
Vehicle Weaknesses
| Weakness | Cost | |
|---|---|---|
| Rust on Door Lower Edges and Axle Springs Door lower edges of the W246 rust, though less severely than the predecessor. Axle springs and components corrode and can break through oxidation. Rust susceptibility inappropriate for the price level. Symptoms: Rust at door lower edge, springs broken through corrosion, paint blistering from 100,000 km | Medium |
Test Reports
TÜV Report 2023
The W246 is among the best compact MPV candidates at the MOT inspection in its age class and was ranked the overall winner in its category in the TÜV Report 2023.
2022-11ADAC Breakdown Statistics 2024
The W246 is among the most breakdown-resistant models in the lower mid-range and reached the top spot in its vehicle class multiple times.
2024-04Alternatives
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Known Problems and Issues +
A total of 74 weaknesses have been documented for the Mercedes-Benz B-Klasse W246 (2011–2019) — 66 engine-related and 8 vehicle-related. 2 problem engines: M266 (1.5-2.0L), OM651DE22 (2.1L Diesel). Typical issues affect Rust, Gearbox, Electronics, HVAC. Considered reliable: M282 (1.3L Turbo).
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 (OM651DE22, 2012–2014) — Stay Away!: Chain Tensioner Seal Leaking — Recall, Timing Chain Stretch (Simplex Chain), Piezo Injector Faults. Power: 163–177 PS.
B-Klasse (OM607, 2013–2019) — Be Careful: Timing belt instead of chain -- maintenance obligation, Timing belt interference engine -- total loss risk, Injector failure K9K base. Power: 90–95 PS.
B-Klasse (OM607, 2013–2019) — Be Careful: Timing belt instead of chain -- maintenance obligation, Timing belt interference engine -- total loss risk, Injector failure K9K base. Power: 109–116 PS.
B-Klasse (OM651DE22, 2014–2019) — Stay Away!: Chain Tensioner Seal Leaking — Recall, Timing Chain Stretch (Simplex Chain), Piezo Injector Faults. Power: 170–177 PS.
B-Klasse (OM608, 2018–2025) — Be Careful: Timing belt change critical, Increased oil consumption / turbo shaft seal, EGR valve contamination. Power: 109–116 PS.
B-Klasse (OM654, 2018–2025) — Be Careful: Rocker Arm and Camshaft Wear, Electric Coolant Pump Leaking — Recall, NOx Sensor Defective — AdBlue Fault and Start Inhibit. Power: 150 PS.
B-Klasse (OM654, 2018–2025) — Be Careful: Rocker Arm and Camshaft Wear, Electric Coolant Pump Leaking — Recall, NOx Sensor Defective — AdBlue Fault and Start Inhibit. Power: 190 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.
B-Klasse (M270DE20, 2012–2019) — Be Careful: Camshaft Adjuster Solenoid Leaks — Oil in Wiring Harness, Recall — Camshaft Break (Production Defect 2015), Electric Thermostat Failure. Power: 184–190 PS.
B-Klasse (M270DE20, 2012–2019) — Be Careful: Camshaft Adjuster Solenoid Leaks — Oil in Wiring Harness, Recall — Camshaft Break (Production Defect 2015), Electric Thermostat Failure. Power: 211 PS.
B-Klasse (M270DE16, 2015–2019) — Be Careful: Camshaft Adjuster Solenoid Leaks — Oil in Wiring Harness, Recall — Camshaft Break (Production Defect 2015), Electric Thermostat Failure. Power: 102 PS.
B-Klasse (M260, 2018–2025) — Be Careful: Exhaust Valve Seat Insert Wear / Cylinder Head, Timing Chain Rattles on Cold Start, Wastegate Actuator Causes Boost Pressure Loss. Power: 184–190 PS.
B-Klasse (M260, 2018–2025) — Be Careful: Exhaust Valve Seat Insert Wear / Cylinder Head, Timing Chain Rattles on Cold Start, Wastegate Actuator Causes Boost Pressure Loss. Power: 224 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
What problems and weaknesses does the Mercedes-Benz B-Klasse W246 have? +
What should I look for when buying a used Mercedes-Benz B-Klasse W246? +
Which engine is recommended? +
Which Mercedes-Benz B-Klasse W246 engine is the most reliable? +
Which Mercedes-Benz B-Klasse W246 engine is the most fun? +
Is the Mercedes-Benz B-Klasse W246 worth buying used? +
What horsepower variants are available for the Mercedes-Benz B-Klasse W246? +
Last updated: February 2026 · All information without guarantee