Artic is probably right on this one, the other possibility but less likely is the throwout bearing, but they usually only make noise under load{clutch pedal in}. VW has to have the best idea around on this, throwout bearing is inside the back of the transaxle, lubricated by gear oil. It lasts longer, is easier to replace when it fails{rarely}, flipside of the coin the design makes it more difficult to align the clutch during replacement{special tool required}.