Changing brightness for speedo

[ASUN]

I know how to adjust the brightness for the entertainment screen.

What about the speedo?

Adjusting the above doesn't seem to do the trick.

I adjusted the little rocker beside the headlight switch, that only changes the brightness of the physical buttons on the center console.

 

[websterize]

Only via coding. I have not tried to adjust the instrument display's brightness. The BKOMBI module would probably be a good start.