My car came with blind spot warning, which I love. It also came with the EPA mandated auto-stop/start, which I hate. I hacked the ECU to turn that off permanently. I also permanently turned off the annoying seat belt warning, even though I always wear my seat belt. Auto bright lights on/off were an up charge for my car which I did not pay for. I later learned that the hardware was there, but they wouldn’t enable it without paying an extra $1000 or so. I easily hacked the ECU to turn that on. That is essential as far as I’m concerned. Same with lane assist, which is not essential but I do like. There are another couple of hacks I did that I can’t remember off the top of my head. Audi has a great forum with a lot of smart people and it was pretty easily done by following the instructions in the forum. I never would have attempted any of it without that guidance.
The blind spot warning seems like that would be good-it isn’t beeping or honking at you all the time just driving down the road.
Auto bright lights is pretty cool too. I used to love having that on the floor where you could hit it with your foot. I always wondered why they got rid of it.
Of course, I never wondered why a company would charge a thousand dollars for it to simply unlock it.