STD 4x Engine Piston Ring Kit Fit 2.0 L M270 M274 GAS 12-19 For A B C E CLA GLA GLC SLC CLASS A45 CLA45 GLA45 This piston ring kit is designed for use with 2.0L M270 and M274 engines manufactured between 2012 and 2019.It includes four piston rings compatible with engine rebuilds for select vehicle models including A, B, C, E, CLA, GLA, GLC, and SLC Class, as well as A45, CLA45, and GLA45 variants.The set supports standard bore applications and is engineered to restore proper compression and oil control during engine overhaul procedures.