Interesting comment. You may be right. I note however that my Mercedes SLK320 and my Audi A4 are both 2001. No problems at all to this point....more than 2-3 years. However overall, I think it very safe to say that Lexus tops them in quality and reliability. The sc430 is one sharp looking car both in and out. Howver, as said, if you love to drive the sc430 is a snooze. I guess I just was taken aback by the particularly harsh comment about MBs....they are not that bad, at least from my experience and what I have heard.
Re things that are designed to last a short period of time, one thing that does piss me off is the bullshit with the run flat tires.....and the premium tires in general. We have enough waste in this world without selling essentially disposable tires (replace every 10-15k). Totally messed up.
Maybe if the SLK280/350 was not such a harsh ride I'd get one of those. The higher end MB is a rip off....I'd go with the Lexus even if boring.