2014 MERCEDES-BENZ B-Class M270 DE16 LA (1.6L Turbo I4 Petrol)/M270 DE20 LA (2.0L Turbo I4 Petrol) (W246)
W246 / Compact MPV (Hatchback) / Global (Europe, North America, others with variations)
M270 DE16 LA (1.6L Turbo I4 Petrol)M270 DE20 LA (2.0L Turbo I4 Petrol)OM651 (2.1L Turbo Diesel I4)Exact year/trim recordSilver
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Potential N46 and M270 engine timing chain wear under high mileage
- Electronic issues with CDI module (common in diesel variants)
First checks
- Verify engine oil level and quality due to turbocharger sensitivity
- Check timing chain noise on higher mileage petrol models
Before replacing parts
- Save fault codes and freeze-frame data before clearing anything.
- Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
- Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.
Important notes
- W246 B-Class launched globally in 2011, continued through 2014 with minor updates.
- Engine and transmission options vary widely by global region and emission standards.
- Oil capacity and recommended oil type depend on specific engine and production date.