This is not real unusual in OM60x engines (I think early ones more commonly). I had it happen on one of my 601 engines and know of it happening on other 601 and 602 engines (I've diagnosed it correctly over the internet at least 3 times). I know of it happening on 2, 2.2 and 2.5 liter engines. I had never heard of it happening on a 603 (3 or 3.5 liter) engine. The picture look exactly like the blown gaskets I've seen.
The head gasket between the #1 cylinder and the chain vault blows out. I believe the "new" head gaskets revised in the late '80s reduce the probability a lot! NONE of the 601/602 engines had any con rod problems. This is NOT what happens with 603.97 engines as they burn oil because the rods are bent - not bend rods because they use oil! Their head gaskets ARE fine!