check that it knows its in an xB:
Hold down the SSP button (right of the dial) about 3 seconds.
It will beep.
It should say xB.
If not turn the dial to cycle between xB,xA, & tC.
There are also three subsettings for each car type (I think normal, feel, & hear)
The radio comes from the factory on the tC setting which sounds like crap in our cars. Personally I like the "xA Feel" settings best.
You can also customize what the display says when turning the car on.
I think the instructions are in the owner's manual (in your glove box.)
If you can't find 'em I've got it written down somewhere
The text button is for your ipod. When you push the button, you have the option to have the album title, or the song title listed instead of just having the plain track #. I believe some cd's also have special read only text or something like that, that basically does the same thing when you push the button.