Got a call from the wife tonight, our 2005 3.0tdi Quattro suddenly started knocking after pulling into our village. I managed to drive it the half mile back to our house but didnt want to go over 10mph as it sounded horrific! While driving along, it appears to knock approx once every tyre revolution, or approx two kerbstone lengths. Once home I jacked up the nearside rear wheel(where it sounds like the noise was mostly coming from) and tried spinning it with car started in neutral(its tip/auto). The wheel seems to be free and no knocking. Even breifly tried it in drive and the wheel spun without noise. Main thing is, has anyone any idea what this is, and will it be safe to drive to our usual garage? Any info/experiences would be appreciated as getting a bit panicky! Cheers, Pete.