My buddy is a wholesaler and buys from dealerships....he will fix it, always has if there are issues. I don't pay until it's fixed. Sounds like e70 is just like the E53 as far as little things go. I'm not worried about that. I'm worried about all the seat stuff via the NAV, all the options/functions and crap from the NAV, etc. The technology stuff when it breaks, scares me because of my S500. That's what I'm really curious about. This 4.8 has every single available option so there's plenty to break, or not. Since 2002, I replaced two CV joints, a water pump, and two regulators, all myself, since 2001. I'd call the E53 HIGHLY, HIGHLY reliable.

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2010 Specialized Epic Carbon Comp XX
1976 FJ40 Toyota Landcruiser (SOA,350ci sbc V8 crawler)
2007 X5 4.8i
2008 Porsche Cayenne Turbo S