Hello,

I have a problem with W205 180kw(245HP) Version C300 2018 year. M274 engine.
What is the difference in pistons between other versions i.e 135kw, 155kw. (184, 211HP).

For example MB Parts says my car uses piston with code A 274 030 09 00.

But looking an W213 with same power output says that it uses A 274 030 04 17 and is replaced with A 274 030 09 00

I am looking for used engine but I am not sure which one to pick, is there any difference in pistons because lower output engines have older codes like: A2740301517, connecting rods look with all the same codes.

Are the pistons all the same with different Part numbers because it looks like the compression rate is 9.8:1 for all of these power versions...

• Associated Part Numbers: 274-030-09-00, 2740300900, 274 030 09 00, 4044197765737
• Replaced Part as the newest part is 274-030-04-17