Audi A3 TDI Iphone or USB
 

I have a company car, Audi A3 TDI 2011.
I found a connection for iphone or ipod, however I couldnt know how to play my music. I dont use iTunes, I use Spotify.

I noticed there is an AUX connection also.
I have found nowhere an usb connection for my mp3 collection.

I need a solution to play my music collection from spotify, not from itunes, I suppose the normal ipod connection only reads files from iTunes app?

Where is the USB port?

If normally its not included, what cable do I need to have to play my spotify music?


Thank you