My S3 killed one of the front wheel bearings so I did some looking around before commiting to the repair. I was completely shocked when out of curriosity I spoke to my local kwik fit and found them to be a lot more knowledgeable than Audi or the local VW / Audi specialist and a hell of a lot more polite and interested to help ! To make this even better they charged me £40 (!!!!) to do each front corner with me supplying the bearing from GSF (£25+Vat), the cost of this at Audi was a vague £230 ish per corner! All in all amazing, If you are in the SW London area I can highly recommend Kwik Fit in Surbiton (speak to Patrick or Ned) if you need a wheel bearing replaced.