No offense, but to me that argument is reminiscent of the one smoking advocates use - "My grandpa smoked 2 packs every day and he lived to a healthy 93 years old" or some such statement. There are always exceptions to the rule, and I personally would love to drive a European luxury car, but to me it's not a gamble I'd be willing to take. There are enough reported issues with BMW, MB and Audi to dissuade many people from purchasing one and that's why Lexus became a competitive alternative to the European brands.
BTW, congratulations on the LS, but I can't imagine waking up and deciding to drop $90k on a car... who even keeps $100 g's in their checking account?