Originally Posted by Tanksowner

I got into a bit of a debate with a Youtuber on the reliability of MB in general and it eventually turned into this guy taking a dump on the OM61x family of engines for reliability. Long story short, he basically said these cast iron diesels were "notorious" for breaking crankshafts. I've personally never, ever, heard of this, but I'm looking to fellow owners who I'm certain know what they're talking about to either substantiate or quell what he said.

1. ARE these engines prone to breaking crankshafts?

2. If so, why?