Here is the answer to your question you pm’d me with, since your inbox is full I couldn’t pm you

As long as you have the vin on any of the vehicles you can email Audi with the vin and they will send you a digital copy of the window sticker. There are only two physical ways to tell if a car has the SD or not. One is to look under the rear of the car at the diff and the other is to scroll through the mmi and look for the setting to change the SD. Hope that helps.
https://goo.gl/images/MDbtNo

This is my car in the pic with the SD
https://goo.gl/images/LeNoH4

Clear out your mailbox too