HI, just seen these posts and need to comment as follows.
I picked up a new Audi A3 40TFSIe in September 2021, at no time did anyone mention to me that there were known software issues with this car. I have spoken to the dealer (Worthing Audi) and Audi UK CEO office and they have admitted they knew about these issues before I was sold the car. I too have been told that a software update is being worked on in Germany but no idea when this might be available. I am having all of the above mentioned shutdown issues, with various log in, password and pin number issues. I have also had an occasion where the car would not open remotely, I had to prize off the plastic lock cover on the drivers door to open the car with the key, as soon as I got inside the car all the alarms started going off and miraculously the car unlocked and reset the alarm on the key fob from inside the car. I called the dealership who told me I needed to replace the battery in the key fob which was absolute rubbish as I had just replaced it. The key fob has worked just fine ever since on the same battery, this was 2 months ago. Does anyone know if I have any recourse with the dealership to return the car for a full refund on the grounds it was sold not fit for purpose?