Its too early to tell, but I opted for Meyle which as Stretch says, just has the words 'Germany' on the box or part itself.
I bought a new center bearing from MB which was marked Slovakia.
The only parts I ordered which felt a bit substandard were TRW for tie rods, easy to swap out and relatively cheap so not too worried.
Meyle HD get some good reviews on Beemer forums, 4 year warranty too.
MEYLE spare parts