I bet it trails a thin blue smoke out the exhaust too......
? Guess how I know this ?
.
I overhauled the turbo my self, it's fiddly to the extreme but not terribly hard, I used a Kent Bergsma (? SP ?) kit from Mercedesssource in Wa. State, a rebuilt turbo is about $350 last time i checked .
My Son (also a Mechanic) told me they're pretty simple so I decided to ty it my ownself, getting to some of the bolts was tricky but it's all do - able in DIY .
Some fractional fasteners on the turbo proper and head scratching trying to figure out how to reach some obscure 17MM nuts .