Crank gasket needed replaced probably because of overfilling at "quick-lube" establishments. Belt tensioner went south.
This is a super model from Mercedes Benz, and probably will prove to be one of it's most reliable. Don't "push it" when cold and the transmission will last much longer! As a side note... the burl walnut trim on my particular car is unbelievably beautiful!
I was amazed to read that the Fast Lube Oil Company you use actually Overfill your Crankcase. I used to go those Places, but I never had your luck.Indeed, I was frequently looking at getting at least half a litre under what I had actually Paid for! If I was not so interested in my Vehicle I could very easily have lost a Motor or Two. Suffice to say I now do all my own Car Maintenance.