I am not sure how to insert a picture in my reply. I tried to insert an image but did not work. Anyways, go to:
http://catalog.eautopartscatalog.com/pmc/wizard.jsp?partner=pmc&year=1993&make=MB&model=190-E-005&category=G&part=Fan+Clutch+Bearing+Brkt
Click on picture to enlarge
I always buy from
www.performancemotorcars.com
They are by far the cheapest.
Good Luck
PS. You may want to try a "Mechanic Stethescope" to pin point the noise. it may prove helpful.