October 2016 A3 S Line TFSI S-A model description S-A?

[60sDel]

Hi all. I will shortly be purchasing an Audi A3 Cabriolet S Line TFSI S-A (Petrol & S-Tronic)

1. Please can anyone tell me what the 'S-A' mean in the registered description of the car I intend to purchase?

2. Also, where can I find/obtain a detailed description of a) the standard build for my car and b) the actual factory build with the added customer options and c) specific factory build details such brake manufacturer, etc. for my car which can sometimes change over a production period.  

Any info would be appreciated. I am new to this site and tend to do all my own maintenance so I am sure to be back. Thank you.