Hello, Picked up a new A3 2.0 TDI s-tronic last weekend, trading in my bmw m135, it was a stock car I went for so the spec was the spec. Officially it has the basic sound system, however reading the threads on the 2 upgrade options it appears the "audi sound system" upgrade gives you a sub and a central dash speaker... I'm pretty sure mine has the basic system but it does have the mid dash speaker grill, is it basically just empty inside? or if it exists does that mean it has a speaker/functioning? I don't think I have the sub I the boot (middle of the spare wheel?) so I guess the speaker in the dash is just empty? Pleasantly surprised by the sound anyway so was curious if it was the upgrade or not... better than the standard system on the bmw. Thanks!