Bought a A3, 2001 1.9tdi a couple of months back. Slight knocking coming from the front right hand side. Yesterday I started to get a whining noise from the same area, this is continuing to happen but only after it's warmed up, suspect bearing has gone?? And would the knocking be the track rod end? With regards the power, when you get to 70-75mph there's a bit of a lull in power and you are getting no more. Power is also reduced until the engine is switched off and then back on again and it's then back to normal. Had the air flow metre changed but it's made no difference. Humph!! Anyone got any ideas?? Much appreciated.