Well after 8 years on my '82 240D. the Turkish hood-star and exhaust hanger donuts I got from Mercedes still look good, and the axle-boots on my CVJ rebuilds still look good. From years of visiting my Pick-N-Pull, I've also accumulated a decent stock of spare relays, switches, hanger-donuts, and other misc hardware for this car. At least most, if not all of it, appears to be made in Germany.
OTOH, my indie Mercedes parts place folded last year, so I may be stuck paying a kings-ransom for parts from Mercedes.
Happy Motoring, Mark