The 2005 Mercedes-Benz S-Class is available as a 4-door, 5-seat sedan. Starting at $111,900, the 2005 Mercedes-Benz S-Class S 55 AMG RWD Sedan is powered by a 5.4L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 14-mpg in the city and 22-mpg on the highway. The top of the line 2005 Mercedes-Benz S-Class AWD, priced at $75,300, is powered by a 4.3L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 22-mpg on the highway.