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 On 5th Gear
Courtesy of VOLKSWAGEN UNITED STATES, INC.
WARNING:
Wear protective gloves.
Heat 5th gear wheel to approx. 100 ° C before pressing on.