So, recently (in the past two months) I started getting an intermittent "gong" sound accompanied by a blinking square around the gear indicator on the dashboard and a blinking LED on the gear shifter lever.
The car doesn't throw any actual warning or any issue in the check control, and seems to shift actually fine. At first I thought it is just annoyed at me not coming to a full stop or not pressing the brake enough, but I've managed to have it happen even when fully stopped and reasonably pushing the brake.
It's totally intermittent, it took me a lot of tries to get it to actually occur on video. From googling various transmission issues, it seems that if there was an actual transmission problem preventing the transmission from shifting into drive, the actual letter D would be blinking - in my case it's just the surrounding box which blinks. The user manual was useless.
Anyone have any clue as to what might be the issue here? Some forums suggest a sensor on the brake pedal?
I even had it happen once today when stopping at a red light and shifting into M/S to prevent stop/start from engaging - the M/S LED was blinking in this case.
Here are videos:
https://www.youtube.com/watch?v=gNXYMwWugDQ
https://www.youtube.com/watch?v=0nCO4uPQtaU