So, further to my earlier post, I've managed to buy one. It's a yellow S4 avant. It's all round a very nice car, with a few small problems. The rear bumper has had one corner touched in and it doesn't match. So I'm gonna remove it and have the whole thing re-painted. The car is down on power, It's a bit lacking in torque. APS have seen the car previously, and from memory say that it's a timing sensor problem on an otherwise very good car. I'm going to change the Hall sensor, timing belt + tensioners, and at the same time do a water pump (hopefully metal impellor type). Oh, and the rocker cover gaskets. Every S4 I've looked at has had a slow leak from these, so I'm not too concerned about that. The question I guess is. What else should I change when I'm in there? What else might cause the lack of power? It's had a new maf and one new lambda. Also N75 and diverter valves replaced. So I suspect it's not an air leak. I havn't got VAG-com to check it with, but my brother plugged in a 1551 from his audi dealership and it came up with nothing to write home about. So......Advicve...always welcome.