Thanks for the help...a couple of questions...where exactly is this part on my S320...and, is it easy(cheap) to just replace the part? It its 30-50 dollars, and its easy to get to and replace, maybe I should just go ahead and replace it anyway.Thanks for your help

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1994 S320
131K miles

1998 ML 320
126K miles

1994 Blue C220
122K miles

Im going to Grad School @ the University of Iowa
Go Hawkeyes!!!