OK, I have a '99 SLK230 and the Supercharger is making a noise at an idle when it is engaged. It sounds like marbles rattling around (I'm diagnosing it as bearing noise). It clears up when I go rev it up and the compressor is engaged. I get no noise when the compressor clutch is not engaged. This ia all on the supercharge and has nothing to do with the A/C. I pulled information from WIS and it says that the supercharger (they call it the compressor) needs to have it's oil supply checked and special oil added. I was dismayed today when I wnet to my local MB dealer and they said it didn't have a separate oil supply and used the Mobil 1 from the engine. I then went home and called them back with the part number supplied in WIS for the special compressor oil and they looked it up and siad they didn't stock it and it was $80+ bucks for whatever unit they supplied it in (liter, I'm thinking). So, has anyone had a supercharger failure or problem? Anyone fixed one or paid for a new one? I have no engine lights on or anything like that but the nosie is not normal nor was it there earlier in the vehicles life. I've owned it since new.
I'm thinking I'm going to have to tear into it and fix it so any experiencd perspectives on the subject?
Thanks,
Wayne Hyde