It's bound to happen as mentioned earlier, no matter how good quality control is -- a mere numbers game.
You should ask the dealer or a regional rep what exactly caused the malady.
Back in the late 80's, when I was high school, a friend of the family purchased a 560 SEC, around $80,000+ at THAT time. A week or so after delivery, the motor "failed" and MB actually flew in a new motor from Germany and replaced it in a matter of days. Tuned out that some machine filings got into the bottom end and he spun a bearing -- if my memory serves me right.