WARNING: This page is about a different car, the 2005 Audi A4, 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: Pressing Off 5th Gear
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Remove circlip before pressing off.
A - Separating device 22... 115 mm, e.g. Kukko 17/2