does any one know the torque value on the pinon nut or the way the nut should be tightened for pre-load after the seal is changed? also what type of atf fluid and quanity.my car is 97 E420

Do a search on here and you will find that there is, for a lack of a better term, a crush ring in there that you tighten to the correct crush tolerance. More details/information in here somewhere.

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Jim