How to remove and replace the nav or climate button on the MFD?

I just replaced the MFD on a 2008 Touring model, and while the Climate button on the MFD works, it is totally worn out, so you can't see that it is the Climate button. The button on the old MFD works fine, but I don't know how to remove it, and don't want to risk breaking it while trying. How do you remove those buttons? I'm guessing it's fairly similar to removing a button on a keyboard, but I'm just not sure.
Thanks!