If you just got it, forget receipts! My 2001 1.8ts had a receipt saying it had been done 3 months earlier. The problem was nothing else got changed. I saw the belt (never had an Audi before) and it looked brand new nice and shiny and polished. I had a rattle coming from the belt side of the car and after doing some delving and research I came up with the tensioner. So I took it to my local Audi, VW specialist and they confirmed the tensioner and they said the belt may have been changed but it's knackered. I thought I was been bummed until they shown me every other a3 in there yard (about 12) and all the belts on them were ribbed both sides! They said as the tensioner wasn't putting tension on the belt over a short/long time the ribs would have worn down to a nice shiny polished look and within weeks it would have snapped! Sooo I asked them to sort it. When I went to collect it they shown me the water pump too and there is no way that had been on 3 months it fell apart just handling it. Basically what I'm saying is ........ if you like your car, throw caution to the wind, there are 4 basic things you want to be doing (on used) 1. get the belt and associated parts done 2. Make sure when the belt is done they time it up right. 3. Oil and filter change (make sure the oil is right spec) 4. Coolant (which should be done when they take your water pump off). and all that will be the best money you ever put in to a car (until you start modding ha ha). Sorry for the 1 big block paragraph I'm using Windows 8 and it don't wont me start a new paragraph for some reason on the forum.