onehundred80
I understand and appreciate your concern over disabling any original systems, these are all good when working correctly. I still have a problem getting the car through an MOT test without which I can not tax or keep running the vehicle. An illuminated ABS light is an automatic failure.
Perhaps its an age thing on my part but like the pilots of the ill fated Boeing 737 Max 8 which had an electric power system not working correctly, I prefer to feel whats going on and make my own corrections when driving.
My car drives, handles and stops very well and performs all round much safer than the requirements for the MOT test, I have checked this out on a rolling road, so if all else fails I have the ultimate solution.
If you remove two bulbs, (ABS/BAS and ESP), from the instrument panel, there will be NO LIGHTS. The bulb out warning light only indicates external light failures, but should this turn out to be a problem I will remove that as well. The occasional backup to shop window check works well.
As for the not required unless breaking the speed limit spoiler, (70 mph in UK), I plan on re-wireing the original dash switch so I can decide when to deploy and do away with the red flashing light.
It seems to me that the original wiring system in these cars is over complex which creates multiple problems when any one malfunction occurs.