This 4-piece piston and ring set is designed for use with the M271 1.8L supercharged (1796cc) Kompressor engine.The pistons have a standard specification with a cylinder bore diameter of 82.0 mm, compressed height of 29.9 mm, wrist pin diameter of 20.0 mm, and wrist pin length of 56.0 mm.Ring thicknesses are 1.2 mm for the ring, 1.5 mm for the second ring, and 2.5 mm for the oil control ring.This set is compatible with vehicles using OE part numbers 2710302217, 2710306617, 2710300024, N000000000936, and N073130020100.It fits models including W203, W204, A209, and C200K equipped with the M271 engine.verify fitment using your vehicle's VIN before purchase.