I brought our E320 with 70k miles on it for servic...

I brought our E320 with 70k miles on it for service, and P tried to scare me into thinking that the suspension could go out (not what I brought it in for) and that I should buy a new Mercedes instead of fixing this one. So which is it P: should I buy a Mercedes because it's a quality vehicle that will last a long time, or should I buy a new one because I should be afraid that something's going to fail even though it's fine now? There was also a scratch on my vehicle which was not there when I dropped it off, and P would not take responsibility. But P that's why you have a routine protocol to inspect vehicles when they're dropped off, and you didn't note a scratch on mine.