Recently purchased a 56 plate 2.0T S-Line Special Edition which I am made up with but have noticed a small problem when steering. It only happens at slow speeds like pulling in or out of driveway or parking in a carpark. When it is nearly full lock the front wheels judder/slide as if im on ice or gravel. I have checked the tyre tread depth and pressure's and both good. When i first noticed it i thought the tyres were over inflated. I was wondering if anyone else has experienced this? I've got it booked in at warrington audi in a few weeks time but was wondering if there is a common fault maybe with steering racks or drive shafts? Just want to be armed with info incase they try to palm me off saying there's nothing up with it. The car is 1 owner and on 27k miles.