I am running a 220d Flywheel on a 240D engine and I didnt even look for marks. If there is no pin or anything and the bolt pattern is round then it will work! I used to think this was a big deal but I built a 400 chevy a few years back with parts from around the shop (no money) had 3 diffrent kinds of pistons and 2 were 70 grams heaver than the rest and had a rebalanced flywheel from a guy that said it would work (350 with a weight) ran 50k miles no problems no vibrations turned 5500 a lot never died!