I noticed some pictures of this Vibe 3 button unit were no longer showing (well they weren't for me when I clicked) so I thought I would post some pics of what the unit looks like behind the "fake" button since I had it apart when installing the 9" car play radio basal. It bugs me having a blank button on the dash in such an in your face location so I decided to add some LEDs (2 of them) to mine for accent lighting; aimed them to illuminate the drivers floor space and part of the center console where the drinks are. I like the end result, subtle but effective.
LEDs are about all you can do here and there is just enough space behind the fake button to work with if you plan on putting the "button spacer" back in it's clipped on position on the three button unit. There is no room behind the fake button because as others have mentioned, the button retainer mechanism for the AC recirculating button sets directly behind this blank button. If you do take this apart, be aware there is a tiny little spring that will fall out when you remove the white (or yellowish) part where the cable clips in. If this spring goes missing then the recirc button will not "ratchet" into a held down position, and will become a momentary switch.
That all said .. I drilled small holes in the "fake button" at an angle for aiming the LEDs where I wanted them. Then pushed the LEDs into the holes in those angles. The wires had to be snaked around and through the unit where wire terminations occurred elsewhere where there was more space. Then I clipped (reinstalled) the fake button cover back onto the unit and it clipped on just fine. When I turned the LEDs on, they were very bright and distracting and I did not like them. I solved this problem by going to the junk yard and snagging another fake button cover. I carved out the bottom of the plastic (leaving the face intact) to create a "sun visor" for over the LEDs (so it wouldn't shine in the drivers eyes). I then hot glued the "Visor" onto the existing button (where the LEDs are installed), and ended up with something that looks factory, and works perfectly.
Anyway, now this "blank button" has a purpose and no longer bothers me..
