Having trouble removing the fan clutch in my 1987 Mercedes 300 SDL.
Is there a special trick or special tool?

To remove the fan clutch: Lift belt tensioner spring off and slacken off, remove the serpentine belt. Find the hex bolt in the center if the fan clutch body (tight quarters between radiator, but can be done without it's removal) Hold fan in one hand and turn the hex bolt counter clockwise until it is out, then carefully wiggle the fan until it comes off the water pump shaft.

Sometimes it's easier to loosen that hex bolt before you remove serp belt tension.

Ike,

I forget the order now, but if remember there is one hex head bolt. That may take the fan off the clutch. Then there are 3 hex head bolts to remove the clutch from the shaft that it rotates on. It takes a very stubby allen socket ( there is a MB part for this socket) or possibly a regular allen wrench might work. It is fairly small, like about 6, 7, or 8 I think.

Chuck