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: Driving In Selector Shaft
Courtesy of VOLKSWAGEN UNITED STATES, INC.
A - Wooden packing
NOTE:
Bring selector shaft/selector cylinder bores into alignment.
Flat on selector shaft and selector finger point in same direction.