Hi, My car was fine until i drove from manchester to london and back the other day, when i got home i could hear the engine rattling, it was like a tin of spanners! if i rev it, the noise goes away. then the next day i was driving to work and it started making a sort of loud whistle?? a bit like the noise a firework makes, just for a few seconds then it goes and it rattles again, then it will be completly fine??? Its driving fine, gave great fuel economy to london (for a 2.6 anyway), i have had quick look around the engine but there is not really much to see! im stuck in work till thursday and its dark when i finish so cant really see anything obvious. Its booked in for a couple of new tyres on friday and i have asked them to change the oil at the same time, i know the last owner changed the oil himself and was wondering if maybe put the wrong oil in ( had been full audi service history till then), but i have had it 6 months and the engine has been perfect. Has anybody had anything like this or got any ideas? Cheers, Ste.