The 2015 Mercedes-Benz S-Class is synonymous with opulence and unmatched luxury. Falling in the sixth generation of the S-Class (the W222 series), this year's model exemplifies premium German engineering. There are seven available trim levels, including the fuel-efficient S 550e Plug-In Hybrid. Engine options start with a 449-hp V8 in the S550, escalating to an outrageous 621-hp V12 in the S65 AMG. The S550 encompasses a rear-wheel drive configuration and comes with a seven-speed automatic transmission, while the rest benefit from a 4MATIC all-wheel-drive system. Key safety features include driver drowsiness monitoring, active lane-keeping assist, and night view assist plus. The infotainment system includes a 12.3-inch display, Burmester surround sound system, and smartphone integration. With model-year updates, the S-Class saw the introduction of a royal S600 trim, the high-performance S65 AMG sedan, and the S550 Plug-In hybrid variant, further extending an already vast range of choices.