ricali,

This could be your problem. Probably the fan clutch bearing rather than the clutch itself. Take a look at this thread:

http://www.peachparts.com/shopforum/showthread.php?threadid=27203

Mine does not have any slack at all, so your 1/8 inch doesn't sound normal.

BTW, I just bought a mechanics stethoscope to check these. I haven't tried it yet.

__________________
D.H.

04 ML500
02 E430

Experience is something you don't get until just after you need it.