2024 MERCEDES-BENZ C-Class M254 E20 DEH LA (1.5L inline-4 mild hybrid)/M264 E15 DEH LA (1.5L inline-4 turbo mild hybrid) (W206)
W206 / Sedan / Estate (market dependent) / Global except USA (Europe, Asia, Middle East, Australia, Latin America)
M254 E20 DEH LA (1.5L inline-4 mild hybrid)M264 E15 DEH LA (1.5L inline-4 turbo mild hybrid)M264 E20 DEH LA (2.0L inline-4 turbo mild hybrid)M139 E35 DEH LA (2.0L inline-4 turbo high-performance AMG)M256 E30 DEH LA (3.0L inline-6 mild hybrid)OM656 (3.0L inline-6 diesel mild hybrid)OM654 (2.0L inline-4 diesel mild hybrid)Exact year/trim recordSilver
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Early M254 mild hybrid starter-generator issues reported under warranty
- DPF clogging in diesel variants under low mileage urban use
First checks
- Check hybrid system warning lights
- Inspect turbocharger boost pressures
- Verify oil level and condition at first service
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
- Global availability varies by engine and fuel regulations.
- AMG versions (e.g., C43, C63) have distinct powertrains not fully covered here.
- Mild hybrid system reduces fuel consumption with 48V belt starter-generator.