I had this problem on my 190E once. If wobbled it quite hard for a while and eventually it unseized. It's not been a problem since.

later!

Russ

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190E's:
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black 2nd owner
http://www.maylane.demon.co.uk/190esmall.jpghttp://www.maylane.demon.co.uk/190esmall2.jpg