From 93 - 95 MB made wiring harnesses that were crap, they extended the warrantee to 100k. In 93 - 95 BMW made V8 motors that were crap; the cylinder walls fall apart. They too have extended the warrantee to 100k on these.
I suppose all manufacturers have their share of bad designs on new product. I think I would rather have the wiring risk than the cylinder risk. They are all nice cars and are all built to be indefinitely rebuildable. Both manufacturers fixed their problems so retrofitted vehicles no longer have those risks.
Bosch Master, ASE Master, L1
33 years MB technician