Barry who works with me has a 1.8 quattro ( i know its not an s3) parts are really expensive for this model as it is an inbetween sort of mish mash, had a nightmare trying to find replacement parts such as downpipe, cat, etc. But the car hasnt let him down and is a great car to drive.
This is probably of no use but just be wary of this model. His car is the Xreg model