How old do you need to be to test drive an Audi TT Coupe?

I Am 17 will i be able to?How old do you need to be to test drive an Audi TT Coupe?You must be able to drive without an adult and past midnight. In other words, you need a senior drivers license. And be interested in buying one. You can't just walk in an drive one then say. No I don't want it; because they will try to sell you a differnt model.