Are you sure that 70% only includes mostly the drivetrane? It seems logically that 70% of a 5345 vehicle would be about 3740 lbs worth of parts.. I can't see how that would preclude the body panels or unibody. Not denying what you're saying, but I'd like more info if you can provide it. I have the .pdf list of parts suppliers that the plant uses (it's a download from their website here:
http://www.bmwusfactory.com/suppliers/ )
I admit I was a bit disappointed to see parts coming from Mexico. Not so much because I don't think they can make good qualify parts, but just because I don't care much for the trend to outsource labor to cheaper labor markets.
My sticker says 70% German, 15% US/Canadian and mysteriously leaves out the Mexico, China and other politically sensitive locations for the remaining 15%..
Anyway, it's neither here or there.. my German made E class had only 85% German content.. It's the way it is.