WARNING: This page is about a different car, the 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 attachment between pressure plate and cover for cracks, check rivet attachments are secure.
Replace clutches showing damaged springs or loose rivet attachments (arrows).