manufacturer issues

Hope everyone's day is going well. I just drove my Audi A5 on about a 500-mile trip. Drove to a city about 2 hours away and back. I got back and went to put stuff away and then got back in to go get food. I put my foot on the brake and press the start button and... nothing. The headlines turn...

What year are your cars?? If 2010's and they are post control arm/tsb installation or manufactured after the control arm change date, please advise. I had a 2009 that had control arms replaced that did not resolve the problem. I now have a 2010 S5 cab that has the newer control arms and the car...