WARNING: This page is about a different car, the 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Removing Roller Sleeve
Courtesy of VOLKSWAGEN UNITED STATES, INC.
A - Internal puller 22 to 28 mm, e.g. Kukko 21/4
Before installing internal puller, destroy plastic bushing inside roller sleeve.