I'll load check the battery before I go, good idea. I think it's fine.
I think I'll bring the alternator, in case the bearing goes bad. Also don't know if the voltage regulator will swap right into the old alternator. The second alternator is from a 93, and the one in the car is a 90. I think the newer one might be slightly higher amp, but I've read that they should swap in.

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1990 300d 2.5 turbo
1995 E300d