Si tu coche ya es algo antiguo y quieres modernizarlo un poco, puedes añadirle un panel digital táctil por muy poco, utilizando una Raspberry Pi junto a su pantalla táctil
I found this tutorial about how to use a raspberry pi to add a digital panel to old cars (canbus port needed)
That would be very naughty of the manufacturer on a 2012… the wheel speed sensor would be connected to a computer and speed PID reported on the canbus, the computer should be calibrated to the trim level of the car (and the wheels that it came with) to report the correct speed.
Having said that manufacturers often overestimate speed by ~5% to prevent being blamed for speeding offences.
That would be very naughty of the manufacturer on a 2012… the wheel speed sensor would be connected to a computer and speed PID reported on the canbus, the computer should be calibrated to the trim level of the car (and the wheels that it came with) to report the correct speed.
Having said that manufacturers often overestimate speed by ~5% to prevent being blamed for speeding offences.
That’s a fantastic idea, however corners exist only to be cut.