Any MB will fit. They may not all be an ideal offset, but if you're not going to drive it I wouldn't even worry. I would avoid Audi/VW as the center bore is too small. The reason 5x114.3 was suggested is because a lot of Fords use them and there's a lot of those in junkyards. They'll definitely fit the center bore (I know because I currently run a set on my 123) and many of the car model offsets are correct, not that it matters for rolling around purposes.

-Rog