The 1999 Mercedes-Benz C-Class is available as a 4-door, 5-seat sedan. Starting at $35,600, the 1999 Mercedes-Benz C-Class C 280 is powered by a 2.8L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 27-mpg on the highway. The top of the line 1999Mercedes-BenzC-ClassBase , priced at $ 53,000 , is powered by a 4.3L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 23-mpg on the highway.