Yeah I was thinking along the same lines. I should have been more clear the first time, there are actually two of the same button. One about 2 1/2 inches from the end of the track and one right at the end and then the same plastic cap as on my old '01 . I guess it's how they create more leg room for the back seat? I'm hoping someone has done this before on an '05 and can tell me for sure.

Thanks,
Erika