You either have the wrong chain or some cheap aftermarket one. I rolled a timing chain onto my 603 a few years ago and the new chain was identical in every way to the old one. But I didn't mess around I went right to the dealer and got a chain. MB makes a special tool which you can rent on this site to crimp the new chain over. You should not be able to tell which link is crimped if you do it correctly.

Don't forget to replace the tensioner and whatever guides you can get to.

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2006 CL500
1969 280SE
2023 Ram 1500
2026 Genesis GV70
2007 Tiara 3200