Package Includes: 4 x Piston Rings Set OEM / Reference Number: 2640301800 Compatible Vehicles: Fits C300 (W205) 2019–2023, 2.0T engine, M264 engine code Fits C260 (W205) 2019–2023, 2.0T engine, M264 engine code Fits CLS260 (C257) 2019–2023, 2.0T engine, M264 engine code Fits CLS300 (C257) 2019–2023, 2.0T engine, M264 engine code Fits CLS350 (C257) 2019–2023, 2.0T engine, M264 engine code Fits E260 (W213) 2019–2023, 2.0T engine, M264 engine code Fits E300 (W213) 2019–2023, 2.0T engine, M264 engine code Fits E350 (W213) 2019–2023, 2.0T engine, M264 engine code Fits GLC260 (X253) 2020–2023, 2.0T engine, M264 engine code Fits GLC300 (X253) 2020–2023, 2.0T engine, M264 engine code Fits GLE350 (X167) 2020–2022, 2.0T engine, M264 engine code Installation Information: 1.Remove the cylinder head assembly from the engine block. 2.Remove the connecting rod caps and push the pistons and connecting rods out of the cylinder block. 3.Remove the old piston rings from the pistons using a piston ring expander. 4.Clean the piston ring grooves thoroughly. 5.Install the piston rings onto the pistons, correct orientation and placement in the grooves.Use a piston ring expander for installation. 6.Lubricate the cylinder walls and the piston rings with engine oil. 7.Insert the piston and connecting rod assembly into the cylinder bore, staggering the piston ring gaps. 8.Reattach the connecting rod caps with bearings and tighten to manufacturer specification. 9.Reinstall the cylinder head assembly onto the engine block. This product is not manufactured by the brand.Model and brand mentions are for compatibility guidance only.