Great posts above; first thing I would check is the cable itself. The strands can start breaking one by one and those are the symptoms; you start losing pedal efficiency and the travel gets longer for the clutch to activate. The next thing I would check, as Gord and others have so eloquently pointed out, is the clutch tube's welds in the tunnel failing and the tube coming totally loose. You'll have to remove the pedal cluster so the third thing I would check while doing that is the little clutch pedal hook where the clutch cable hooks on to. With enough use, those start wearing out a groove to the point that the hook is almost breaking off. That little hook replacement is also readily available from VW part suppliers.