Our C4 chassis UrS4s and S6s use a two-piece driveshaft (aka "propeller shaft") that has a CV joint at the front, a Hotchkiss U-joint in the middle and a CV joint at the end. There is also a steady bearing in the middle. None of these parts are available seperately. The dealer will only sell you a complete unit, Item 1, in the diagram below:



Here is what the centre bearing looks like:


Photo courtesy of 034 Motorsports (see link below)

Being the sly and clever owners we are, alternative "solutions" have evolved to solve problems with the CV joints and/or center bearing. Here are some of them:

Tornado//S6's Driveshaft R&R post

Blaufergnuegen's Drive Shaft Kit

034's centre bearing replacement

Link to quattro20v's Driveshaft rebuilt post