I am going to try and installing an iSimple controller for my 2006 TL.

https://acurazine.com/forums/3g-tl-audio-bluetooth-electronics-navigation-94/i-058-just-installed-peripheral-electronics-isimple-ipod-adapter-review-install-tips-697728/

Does anyone have an idea how to open up the carpeted area so I can get access? Thanks-

I didnt have to open any carpet to install mine . Just took off a few plastic trim pieces and that was it . I ran the cable up into the center console