I live in teesside and was wondering where is the best place to buy a crankcase breather filter from. I have a small oil leak (about size of 50p) every morning after ive used the car. There is no obvious place I can see it comimg from. Ive googled and looked on ebay but cant find it. My car is a 2000 a6 2.5tdi quattro. Any pointers to where to get one would be wundebar.