The 2011 Mercedes-Benz S-Class is a premium luxury sedan that exemplifies the brand's commitment to opulence, performance, and cutting-edge technology. It was last redesigned as part of the W221 generation for the 2007 model year, marking its fifth generation. The 2011 S-Class is available in four powerful trims: S550, S600, S63 AMG, and S65 AMG, each outfitted with a different engine. Power plants range from a 382-hp V8 for the S550 to a biturbo 604-hp V12 in the S65 AMG. All models have a rear-wheel drive with an all-wheel-drive option for the S550. The interior is extravagantly appointed with high-grade leather, wood, and metal trims. Infotainment features include an 8-inch screen, COMAND system, and Harman Kardon surround sound. Safety highlights include attention assist, PRE-SAFE system, and optional night vision.