Thanks to all that have replied.. I have purchased the parts from mercedesshop.com. the pulley was 117.50 and belt tensioner shock was 22.63 I also purchased the Mercedes CD based manual for my car.. I am an experienced DIY but only with Chevys not MB... The tensioner needs replacement because it the adjustment was all the way out as the MB shop told me.. But at 800 USD I'll try to repair it myself.. my next repair will be the Struts.. The shop says they are leaking ??
Anyone want to take a shot with info on how to do struts ?

Thanks again..

BJ