you can follow these instruction, instead adding 32, you have to wait few second it comes up a yellow window with all additional options and values.
https://www.youtube.com/watch?v=zaYHSLoSGIw
You can try at least, cause it takes less then 5mins, You might be lucky, so you do have to fit any DAB module. Let me know, how did it go.
by this video I enabled "Battery level" on MMI display, I also enabled "Oil level" but it comes up in grey colour, so probably I don't have oil sensor fitted in my car.