That was a 104 eng. production change and was in late '95. Any engine after serial # 12-672236 had the new tensioner modification. All earlier Serial numbered 104/HFM engines [ 93-95] had the pointer/shock set-up.

http://catalog.peachparts.com/RenderScriptTemplate.epc?_cmd=epccat_VehicleAAA&cookieID=2GN17VPXQ2H401ZD1J&yearid=1995%40%401995&makeid=MB%40%40MB%40%40X&modelid=E%2D320%2D001%40%40E+320+Sedan&catid=G%40%40Cooling+System&mode=PA&subcatid=G6000@@Accessory+Belt+Tensioner

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