The 2014 Mercedes-Benz S-Class is available as a 4-door, 5-seat sedan. Starting at $92,900, the 2014 Mercedes-Benz S-Class S 550 RWD Sedan is powered by a 4.7L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 25-mpg on the highway. The top of the line 2014Mercedes-BenzS-ClassS 63 AMG AWD 4MATIC Sedan , priced at $ 139,500 , is powered by a 5.5L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 23-mpg on the highway.