Audi A3 BOSE speakers
 

Hi,

This is an embarrassingly basic question, but here goes...

How do I identify whether I have the Audi BOSE speaker upgrade on a 99 A3?
Just bought it second hand and assume that it doesn't but don't actually
know how to confirm this.

It has the Concert tape deck which shows "BOSE" when switched on and there
is an Audi labelled sub in the boot. There are 6 unlabelled speakers.

I'm 99% sure this is the basic setup but would be grateful if anyone could
help to confirm this.

Regards,
John