My daughter's car didn't need the tool to hold the Fan Clutch pulley from behind. I could hold the belt tight and it loosened up fine. However, on my '91 300E, I had to use a metal rod with a bend in the end (I used a pegboard hanging rod and stuck it in there) and got it nice and jammed in the hole behind the pulley before I could looosen the 8mm Hex Bolt (I think) on the clutch. I also had to buy a flatter wratchet tool that would fit between the the radiator and the clutch for the hex socket. MB makes the tool for this but you can't get it locally at any auto parts store (maybe at MB dealer). Some guys use a long screwdriver and bend the end to make the tool. That hole is there on '91's and later. It was NOT on my daughter's '87! Weird! Those pulley bolts that hold the fan on are almost impossible to get off! i had to get a new fan and clutch because my fan blade was chipped. Let me know if you need anymore help. sptt144@aol.com

Steve