Does anyone know how the four bezel cluster buttons are attached to the MFD?

I was trying to find out the same thing. I know there's screws on the back side, but do the actual buttons come off the front?

 

Why? If there is a problem with the switch underneath a button that part will probably be mounted on a circuit board. The button that the driver sees could be part of that switch, or could be just a piece of plastic which floats between the switch and the bezel. There are lots of variations on this theme.

If this is because the letters are wearing off try contacting one of the many small companies that make custom vinyl stickers. I looked and found a bunch selling joke stickers (things like "eject") but none with labels that are appropriate here. Unless you want to use a picture of a banana or an oil slick instead of "INFO".

 

The switch is a separate plastic rocker on the bezel. There is a separate rubber button beneath the plastic button. The plastic switch on the top has nothing to do with the bottom circuit board.

 

It won't look quite the same, at least without a lot of work, but one can obtain inkjet printable vinyl sticker sheets and make whatever labels one might desire. Apparently some of these work with a laser jet too. I have not done this myself though.

The video doesn't indicate how well this technology would hold up to multiple finger presses or sitting in the hot sun. Anyway, the products of one company that makes these are shown here:

Home - Royal Elements: Printable Vinyl Sticker Paper & More!

I think the matte paper would be better in a car than the glossy.