I'm pretty easy-going, but blew my top when the MB service tech wrecked my car and they waited a couple of days to tell me. This happened about 10 years ago. They made me whole and I've not had one issue with them since then. Ironically, I've not purchased a car from them since my first MB 13 years ago, I've gotten better deals from MB dealerships elsewhere. Doesn't seem to matter to the service guys at all, I get top notch treatment including loaners with every visit.