WARNING: This page is about a different car, the 2008 Audi A4, 2007 Audi A4, 2006 Audi A4, and 2005 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Pressing Off 1st And 2nd Gear Synchronizing Hub
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Remove circlip before pressing off.
Place selector gear in center of thrust ring VW 470 to press off synchronizing hub with 1st speed selector gear.