When mine started to fail, you could feel a vibration at certain speeds with the clutch engaged, which disappeared completely when the clutch was dipped. With time, the vibration got worse especially under acceleration and there was a noticeable loss of power. If yours is on its way out, I suggest you get it looked at sharpish as I left mine and eventually had to replace the gearbox, driveshafts and complete clutch assy..... There was a warranty recall on this fault, but apparently it only applied to 130bhp versions for some reason ????? 2003 TDi Mk II 115bhp 150,000km on the clock