Seals And Gaskets

WARNING: This page is about a different car, the 2022 Audi SQ7, 2022 Audi S7, and 2022 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

Always replace the gaskets and seals.
After removing seals, inspect the contact surfaces on housings and shafts for burrs and damage and repair if necessary.
Remove any liquid sealant residue completely from sealing surfaces.