With a secure, power retractable hardtop, the 2007 Mercedes-Benz SLK-Class roadster offers more refinement and civility than budget-priced roadsters like the Mazda Miata and Pontiac Solstice, and provides a luxurious interior and performance similar to that of the larger SL-Class. It also ranks as one of the safest convertibles, with head-protective side air bags.