These guys have a lot of helpful diagrams.

Having read several pdf's on 722.x transmissions, not one has the B1 valve with a tapered body, see pic below.



See there kit here (eBay)


http://www.ebay.co.uk/itm/722-3-722-4-Gas-Kit-Superior-K722A-G-MERCEDES-BENZ-81-/320738190639

__________________
David


1996 Mercedes S124 E300TD - 129k - rolling restoration project -

1998 Mercedes W210 300TD - 118k (assimilated into above vehicle)