Links on rear are common and the most common is the thrust link. This is the lowest one and is at a 45 degree angle to the chassis.
Front end most common is the idler arm bushings..
Both short $$ and two of the first places to look/check..

http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1A70KFNW8&year=1994&make=MB&model=E-320-004&category=L&part=Thrust+Arm

http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1A70KFNW8&year=1995&make=MB&model=E-320-004&category=M&part=Idler+Arm+Repair+Kit