[Rob.Achmann]

Does anyone know, from looking at the transmission, which end seal is the correct one? The dealer doesn't actually know and would have to be doing the job and have both ready for which ever one it might be: It could be 16 or 17. Is there a code in the transmission serial number, or in your VIN?

This may not be super helpful, especially with the heat shield, but this is the underside - you can see that is needs a new seal!

 

[PZ]

018 409 399 B is listed for the back of the center diff and the one I used on my car. The #400 is listed as the center diff input seal.