What does it mean if a 1991 Audi 100 pedal stopped returning to the up position and the clutch does not disengage?
a similaar thing happened on my cavalier when the cable snapped, check to see if there is a clutch cable, if the system is hydraulic has something similar happened? loss of hydraulic fluid or the like.
Audis have a hydraulic clutch system, with a master cylinder (in car on firewall) and a slave cylinder (outside on transmission) with a metal tube between them (which looks like a brake line). One of the cylinders may be blown or the trouble could be the clutch itself, but most likely one of the cylinders needs to be rebuilt.