He did tell me about the autochanger and the memory card functions. I knew about them anyway from the price list and brochure. However, as is stated above I have an ipod. This made the 6CD in my previous car totally redundant when I got it and would do the same in the GTi. The salesman gave me a free ipod cable andI was away - job's a good 'un. Just stick the ipod in the under arm rest storage hole and leave it to play. I've got track details on the 310 and artist track and album on the dashboard display if I want it. Perfect. All of this applies to the memory card feature too.
What I'd have paid for a 510 I could buy a really nice Tom Tom which has a Bluetooth phone system (£200 or so) and I've saved £200 or so on the price of the 510, £300 or so on the price of hands free phone installment and £gazillions on the price of installed sat nav. Bit of a no brainer in my opinion.