The 2003 Mercedes-Benz SL-Class is available as a 2-door, 2-seat convertible. Starting at $85,990, the 2003 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 15-mpg in the city and 22-mpg on the highway. The top of the line 2003 Mercedes-Benz SL-Class SL 55 AMG, priced at $113,250, 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 20-mpg on the highway.