WARNING: This page is about a different car, the 2024 Audi S6 and 2024 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
Courtesy of AUDI OF AMERICA, LLC
-- Install standard puller such as Kukko No. 21/4.
-- Tighten nut so two jaws of puller hook onto metal sleeve of seal.