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: Checking Spring Connections And Rivet Connections
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Check spring connection between pressure plate and cover for cracks and make sure rivet fastenings are seated tightly.
Replace clutches with damaged springs or loose riveted fastenings -arrows-.