Thank you. This is a great thread. I pulled the blower fan (w/Filters) from 94 E320 and had a shop repair. He did not put in new brushes (unfortunately) even though I asked him to. I had read a thread saying they are only good for 85K miles. He said their was enough brush on them and it ran fine. He did say it was probably the blower regulator that caused him to replace the armature. Your comment on "dirty filters" was probably my answer. The filters were plugged on the 160K miles driven. It looks like I need to go deeper under the blower fan and locate the blower regulator. I do hope Potomac Recycler has one for me because I noted they cost $400. Any other suggestions?