1.6 / 2.0 turbo petrol (M270)
2011–2018 · petrol · 1595cc · 156hp
Engine codes: M270
Reliability, common problems and owner reviews for the Mercedes Benz B-Class 1.6 / 2.0 turbo petrol (M270). Check this before you buy used.
The W246 moved to the turbocharged M270 (B180/B200) — punchy and economical, and a clear modern step up, but a turbo direct-injection engine with the usual modern cautions: timing-chain wear on some early examples, direct-injection intake carbon over time, and turbo/ancillary care. Often paired with the 7G-DCT dual-clutch, so check the gearbox too. Well-serviced examples are dependable; buy on documented history.
Same engine, other cars
This is the same physical engine (M270) sold under different names across brands. Reliability is broadly shared — cross-check these:
Known Issues
Some early M270 chains/tensioners wear → rattle; check on cold start.
Fix / Workaround: Strict oil; replace chain kit at rattle.
Repair cost: €500–€1300
Typically appears after: 120,000 km
Direct injection → intake-valve carbon over time.
Fix / Workaround: Walnut-blast intake if rough.
Repair cost: €250–€550
Typically appears after: 130,000 km
Dual-clutch needs fluid service; shudder/wear if neglected.
Fix / Workaround: DCT fluid service; diagnose shudder.
Repair cost: €250–€1800
Mileage Thresholds
After 150,000 km: Chain + DCT attention.
Pre-Purchase Checklist
- ☐Cold-start chain rattle check
- ☐DCT fluid + shudder history
- ☐Rough idle = intake carbon
Frequently asked questions
Is the Mercedes Benz B-Class 1.6 / 2.0 turbo petrol (M270) reliable?
Maint. Sensitive — The W246 moved to the turbocharged M270 (B180/B200) — punchy and economical, and a clear modern step up, but a turbo direct-injection engine with the usual modern cautions: timing-chain wear on some early examples, direct-injection intake carbon over time, and turbo/ancillary care. Often paired with the 7G-DCT dual-clutch, so check the gearbox too. Well-serviced examples are dependable; buy on documented history.
What are the common problems and reviews for the Mercedes Benz B-Class 1.6 / 2.0 turbo petrol (M270)?
The most commonly reported problems: Timing chain wear (early), Intake carbon (DI), 7G-DCT clutch (auto).
Is a used Mercedes Benz B-Class 1.6 / 2.0 turbo petrol (M270) worth buying?
Fine if serviced correctly — but it punishes neglect hard. History and the right consumables matter.