Ring an Audi main dealer and ask if they can provide you with a build sheet.
Alternately pay for an HPI check and include a Spec Check with the search.

 

or pay 7 euro for 1-hour access to erWin, and download the whole PR code&description list

erWin – Homepage not logged on

erwin.audi.com

 

There's an A5 sized bit of paper that lists all the options fitted (in 3 letter codes) I guess that's the build sheet Livewire talked about. There was a copy stuck inside the front cover of my paper service book. Think there's also a copy stuck to the boot floor under the carpet. You can get a copy of what each code is from a few places. One here (7) VAG optional equipment codes | Audi TT Forum

 

yes, that is PR label and usually is attached to service book, but on newer vehicles it has been replaced by a digital version, so the build list is available also in myaudi