The R170 model SLK utilized the C-Class chassis for its foundation with wheelbase shortened to 94.4 inches. It measured 157.2 inches in overall length, 67.4 inches wide, and 50.6 inches high. What made it unique in the segment was the folding hardtop, which the company called Vario roof, allowing the car to possess the qualities of both a coupe and convertible. The SLK was equipped with a supercharged 2.3L inline-4 that produced 193 HP at 5300 rpm and 206.8 ft-lb of torque at 2500 rpm. Shifting was performed through a 5-speed automatic transmission.