The 1999 Mercedes-Benz S-Class is available as a 4-door, 5-seat sedan. Starting at $64,750, the 1999 Mercedes-Benz S-Class S 320 is powered by a 3.2L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 24-mpg on the highway. The top of the line 1999Mercedes-BenzS-ClassS 600 , priced at $ 134,250 , is powered by a 6.0L , 12 - cylinder engine mated to an automatic transmission that returns an EPA estimated 13-mpg in the city and 19-mpg on the highway.