Liebherr 611 with a Mercedes motor, but which one?

I have one of the early liebherr 611s, with the Mercedes diesel. Long story short the operator ran it low on oil and threw a rod thru the block 6+ years ago. I’m trying to find a replacement motor but don’t know exactly which one I’m looking for. I’ve seen that the 631 uses the OM352 from Mercedes, but I thought mine was an inline 4 turbo. Anyone have experience with this early of a machine to know exactly what motor is in it?