The 2011 Mercedes-Benz S-Class is available as a 4-door, 5-seat sedan. Starting at $158,050, the 2011 Mercedes-Benz S-Class S 600 RWD Sedan is powered by a 5.5L , 12 -cylinder engine mated to an automatic transmission that returns an EPA estimated 12-mpg in the city and 19-mpg on the highway. The top of the line 2011Mercedes-BenzS-ClassS 400 Hybrid RWD Sedan , priced at $ 91,000 , is powered by a 3.5L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 25-mpg on the highway.