M272 Pistons & Rings Set with part numbers 2720304017, 2720301018, and 2720300117.Designed for M272 2.5L and 3.0L V6 engines.Compatible with E-Class models W212 and W211.Cylinder bore diameter is 88 mm.Bolt diameter is 22 mm with a bolt length of 48 mm.Ring thicknesses are 1.5 mm, 1.8 mm, and 2.5 mm.Fits M272 E25 (2496 cc) and M272 E30 (2996 cc / 2997 cc) DOHC V6 engines.Package includes one complete set of pistons and rings.Compatible with vehicles including C230 (2005–2009 W203/W204), C250 (2010–2012 W204), E230 (2007–2008 W211), C280 (2006–2009 W204), C300 (2008–2013 W204), E280 (2005–2009 W211), E300 (2008–2014 W212), CLK280 (2005–2009 A209/C209), GLK300 (2011–2015 X204), CLS300 (2009–2010 C219), ML300 (2010–2011 W164), R280/R300 (2008–2013 V251), S280/S300 (2006–2012 W221), SL300 (2009–2011 R230), SLK280 (2005–2008 R171), and SLK300 (2008–2011 R171).