I'll guess that either a finger broke off the pressure plate, or your TO bearing is hosed. This is just based off my personal experience, but it sounds familiar: http://www.peachparts.com/shopforum/diesel-discussion/261712-some-mangled-clutch-components-question.html

Good luck, I hope I'm wrong and it's really something simple.

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'95 E300D ("Tank") - 231,000 miles
'79 240D ("Biscuit") - 197,250 miles (Sold)
'83 240D ("Ding-Ding") - 217,000 miles (Death by deer)
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"Back off, man. I’m a scientist” ~ Peter Venkman