I rang Audi (belfast) and they said that it was early to have adblue (Sept 2011) but the fella said if its beside the fuel cap it must have it and that it should bring a dash light up when near out. So I'm wandering how many miles do you get from the adblue tank when it's full, as I have done 6,000 miles on car since buying and I haven't seen any dash lights yet.