I'm pretty sure the 5 button does not work correctly, upon further inspection. I looked at it from the bottom and not only does it not feel like the other buttons but it also is slightly more pushed in than the other buttons.
I would like to take the face off, but I'm not sure how. I can do it without instructions and/or pics, but it will go smoother with instuctions if anyone knows a site that as them for this head unit or a similar one.
I don't really care, if I don't have a "5" button

I'm
almost temped just to rip it out

All I want is to play my music from my mp3 player. I could care less about any of the functions of this head unit. Maybe volume and source button I need, that's about it.
Could this problem also be caused by a broken cable that goes to the faceplate? I have a broken cable. I don't know if it broke trying to take the faceplate off or if it was already broken.