The 2006 Mercedes-Benz SL-Class is available as a 2-door, 2-seat convertible. Starting at $92,900, the 2006 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 24-mpg on the highway. The top of the line 2006 Mercedes-Benz SL-Class SL 65 AMG, priced at $185,000, 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.