It must be incorrect unless you are putting it on backwards. If you are avoiding an expensive replacement, ebay has quite a few of them cheap. I got my replacement for about $40. OE Sachs.

Since you have the clutch off, make sure to inspect the bearing bracket it attaches to. ANY play or bearing noise and you really need to replace it now. Last thing you want is the new clutch sheering off and dropping a nuke on your radiator among other items.

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I thought it's incorrect too. But surprisingly there are other people selling the same thing on Ebay, saying it will fit if you get the right fan blade. I even tried removing the fan blade and putting on only the clutch, still it jam.

http://cgi.ebay.com/ebaymotors/MERCEDES-RADIATOR-COOLING-FAN-VISCOUS-CLUTCH-M103-W124-_W0QQcmdZViewItemQQhashZitem2eaf83eda9QQitemZ200513154473QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccesso ries

Bearing Bracket? Do you mean the assembly on the pulley where you attach the fan clutch to? How do I check it? Just wiggle the pulley? Thx

By the way, I am thinking of grabbing an angle grinder and grind down the thin fins on the new clutch so that it will fit, just temporarily until I can get the correct replacement? Would this then cause the clutch to always be engaged? at a lower temp? Fine if it engage at a lower temp, it would be far worse if it won't engage.

Do you have the link to Ebayer OE Sachs? I need to order a new one asap.