So I'm new to this site and it's interesting to discover so many problems; so many people. I purchased my MB new and performed all scheduled maintenance. My Supercharger failed at 47K but after 4 years. The cost to repair was $2,000. Of course the dealer would not consider the warranty since the car was 4 years and 6 months old but less than the 50K miles. I expected more from MB. I had this idea that MB workmanship, quality, reliability, etc. was better than most. I wanted to know the history of this failure and the dealer did not have this kind of info. I e-mailed and called MB and they don't have this kind of info either. How can MB improve their cars if they don't have this info. So, has anyone experience a premature failure of their supercharger?