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
-- Tap lightly with hammer on jaw of specialGrease Cap Puller:VW637/2
in order to loosen grease cap slightly on the wheel hub.