The 1999 Mercedes-Benz M-Class is available as a 4-door, 5-seat sport utility. Starting at $34,950, the 1999 Mercedes-Benz M-Class Base 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 21-mpg on the highway. The top of the line 1999 Mercedes-Benz M-Class Base, priced at $43,750, is powered by a 4.3L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 18-mpg on the highway.