I put the S3 in for it's first MOT a couple of weeks early so that any faults found would be covered under warranty. It turns out that one of my rear springs was broken very near the end. I was told "no problem it's covered under warranty and we'll change it". I pointed out that springs are normally changed as a pair if one's broken. They told me that Audi recommend springs are changed as a pair but will only replace the broken one under warranty, if I wanted the other one changed as well I'd have to pay for that. So if I asked them to change one broken spring for me they'd advise me to change both, but if they're paying they only change one. Either the recommendation to change both at the same time is false and a money making exercise or it is best practise to change both at the same time but because one isn't broken they use that as an excuse to wriggle out of following their own working practices and the customer is left with a car with suspect suspension. Unless he pays for it himself. I paid for the second spring to be fitted myself by the way as I know what I would do. Vorsprung durch technique!