Got a notification from my Tesla app for a software update on 7/23. The s/w version was 2018.24.1 when I took delivery of my M3 on 6/29. So I did an upgrade overnight when charging my M3. The new update features a lock confirmation audio which I really like. So now as I walk away from my car, I will hear an audio beep in addition the light flashing. It’s a really cool. No need to look back to check for light flashing and/or folding mirrors anymore.