Tips to Verify Compatibility of a Used M278 Engine for W222 Models

When planning a complete engine replacement for your W222, confirming compatibility of the M278 4.7L V8 engine is critical. At BS Auto Supplies LLC, we help customers match the correct OEM Mercedes engine to their vehicle for seamless installation and performance. First, verify the exact engine code and VIN to ensure the Engine for 2013 MERCEDES-BENZ S550 aligns with W222 specifications. Compare part numbers between the 2014 Mercedes S550 engine and 2015 Mercedes S550 engine, as minor electronic or sensor differences may exist. Always confirm whether your vehicle requires an AWD engine, since 4MATIC models have distinct drivetrain configurations. Next, inspect compatibility of wiring harnesses, ECU programming, turbo components, and mounting points. A true OEM-spec engine designed for Mercedes-Benz vehicles ensures proper integration, power delivery, and long-term reliability. Choosing a trusted supplier like BS Auto Supplies LLC guarantees tested engines, verified fitment, and expert guidance—so your luxury sedan returns to peak performance with confidence.