The Mercedes-Benz S550 is renowned for its sophisticated engineering, power, and luxury. The 2014–2015 S550 W222\'s M278 4.7L V8 engine produces outstanding performance. But wear and failure can happen over time, just as with any high-performance engine. When looking for a Used Engine for 2014–2015 Mercedes S550 W222 M278 4.7L V8 near me, being aware of the danger signs early on will help you save money and make wise choices.