The 2000 Mercedes-Benz SL-Class is available as a 2-door, 2-seat convertible. Starting at $82,600, the 2000 Mercedes-Benz SL-Class SL 500 is powered by a 5.0L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 23-mpg on the highway. The top of the line 2000Mercedes-BenzSL-ClassSL 600 , priced at $ 128,950 , 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.