The only thing a break-in oil is for is seating the rings, and since chrome-molly compression rings don't "seat" like cast iron ones do, not longer critcal. If you look at the profile of MB rings, you will notice that none of them have a sharp edge like older cast iron ones had. All flat-faced with radiused edges.
If you can find a real break-in filter (they filter much smaller particles than regular filters), use it, but not for more than 100 or so miles -- low oil flow since they are so "tight".
You will be fine if you use standard oil -- synthetic is a waste! -- and drive a couple hundred miles, no more, before changing it after a rebuild.
You do, after 50 miles or so, want to climb a couple steep hills at low speed in high gear, though -- makes sure the rings seat well, as if the don't seat pretty quickly, they may not. Refering to the oil control rings here --- !
Initial oil consumption may be high -- once it goes down to normal, you are home free!
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!