Great advice here from all of you Gentlemen.
I was concerned in the beginning too, Roland.
But I just collected the little parts as they came off during disassembly and stored them in zip bags .
Especially, I put a note with the Mercedes work job group number (e.g. "Gr. 25 clutch"), small description and date on it.
Later, before re-plating all of the batches, I placed the content of each bag on millimeter paper and took pictures of it. Without my digi cam this would not have been possible. 100s of pics ...!
Sometimes I even printed out the pics - in supersized manner in order to sort the replated parts back to their individual assembly group.
You do interchange a part here and there ...; especially there are bolts that are 22 mm long, others 25 mm long .... This can be very confusing.
But on the long run, it was not much of a problem.
It was very helpful to have a couple (plenty) of extra standard parts and bolts.
I had (and still have) all metric parts (M4, M5, M6, M8, M10, etc.) stored in assortment boxes and with the help of surplus materials of the standard bolts, washers and nuts
it was all-in-all a very nice and positive re-assembly experience.
Looking very much forward to doing this again in the future ...
Best,
Achim
(gascap, nuts&bolts collector)