2012 MERCEDES-BENZ C-Class M271 DE18 LA (1.8L I4 supercharged petrol)/M272 DE35 (3.5L V6 petrol) (W204)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Balance shaft wear in early M272 engines
• Rust issues in some climates (wheel arches)

First checks

• Timing chain condition on M272 petrol engines
• Diesel particulate filter status on diesel models

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 markets varied in exact available engines and emissions equipment due to regulatory requirements.
• Standard and AMG performance versions exist; the latter are excluded from this profile unless specified.