Pistons Rings Set STD For W176 A250 CLA250 GLA250 2.0T M270.920 Fit for M270.920 2.0L L4 1991cc Turbocharged engine OE numbers A 270 030 20 17 A 270 030 00 24 Replacement OE numbers A 270 030 04 17 A 270 030 11 17 A 270 030 19 17 A 270 030 22 17 A 270 030 26 17 A 270 030 28 17 A 270 030 29 17 A 270 030 01 24 Specifications STD 0.00 specification no cylinder bore expansion Cylinder bore diameter 83.00mm Bolt diameter 20mm Bolt length 51mm Ring thickness 1.2mm 1.0mm 2.0mm Package includes Piston set 1 unit Piston ring set 1 unit Compatible models A220 2014–2018 W176 A250 2012–2019 W176 A260 2012–2015 W176 B200 2012–2016 W242 W246 B220 2013–2017 W242 W246 B250 2013–2017 W242 W246 B260 2013–2017 W242 W246 CLA220 2015–2018 C117 X117 CLA250 2013–2018 C117 X117 CLA260 2014–2017 C117 X117 GLA200 2014–2018 X156 GLA220 2015–2018 X156 GLA250 2013–2018 X156 GLA260 2014–2018 X156