I believe my crank pulley may be damaged. I heard a weird noise while driving today. So I popped the hood with the engine running and noticed the crank pulley had a serious wobble. It was near dark so I didn't check to see how tight the bolt on it was, but no issues with the belt, as it was tight. Everthing else looked fine under the hood. No codes were thrown either. I did a little research earlier and found a couple threads on damaged crank pulleys on here and on the mb forum. Looks like the gaskets/seals go bad on them. I need to pull mine off to be sure, but I'm suspecting this is the problem. I also read something about a mercedes recall on these crank pulleys. Just thought it was interesting, as I had not heard of this before. Anyways, just looking for some advice. Anyone have this happen to them? How common is this problem? Anyone selling a low mileage oem crank pulley? Should I buy a new one because the problem could happen again to a used pulley? BTW my crank pulley is the stock one and I've never touched it. I do have a 65mm sc pulley with a nw psk. Car has 65,000 miles. Help is appreciated, thanks.