We have a 99 Regal GS in the family w/ an Eaton blower..Very quiet. I know these SC'ers Really need their oil looked after every 20K or so. Unfortunately most of the units out there are neglected. Did you change the oil before you installed the blower?

Jonathan

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Blue Ridge Mercedes
Jonathan Hodgman
http://www.blueridgemb.com/
Enthusiast Service, Restoration & Tuning.
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Located in the Atlanta area
Specializing in all pre and post merger AMG's including Hammers and DOHC M117 engines.
Mercedes Repair Atlanta