2011 MERCEDES-BENZ B-Class M270 DE16 LA (B180, B200 petrol)/OM654 (B180d, B200d diesel) (W246)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Timing chain tensioner wear on early M270 engines
• DPF clogging in diesel models under short-trip usage
• Turbocharger issues in high mileage units

First checks

• Timing chain condition
• Condition and functionality of diesel DPF system
• Transmission shifting behavior

Vor dem Teiletausch

• 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

• Global availability of engines and transmissions varies by market and emissions regulations.
• 2011 marks the introduction year of the W246 generation with improved safety and efficiency over the outgoing model.