The Mercedes-Benz C63 AMG P31 Development Package Sedan was a variant of the W204 C63 AMG. Introduced for the 2011 model year, the P31 Development Package was an optional offering that included a variety of performance improvements. This included upgraded brakes, suspension components, and most notably, a substantial power increase from the engine. These P31 sedans developed 480hp from their naturally aspirated 6.2L V8 engine, with this power driving the rear wheels through a 7 speed automatic transmission. Production of the W204 C63 AMG P31 Development Package sedan ended in 2013.