For anyone interested or curious as to what the B2 piston problem is, here is the definitive thread that describes this problem and the fix:

http://www.peachparts.com/shopforum/showthread.php?threadid=44423&highlight=piston+in+transmission

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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".