Checking release bearing with mechanically attached plastic ring

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: Checking Release Bearing With Plastic Ring Attached

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Identification: retaining tabs around plastic ring - arrows -.

The release bearing must be replaced if plastic ring - 1 - has come loose.
The release bearing - 3 - must be replaced if groove - arrow2 - worn on the plastic ring - 1 - is deeper than 0.8mm.