paparazzi

I want to install navi in my TL. car toys in Denver thinks they can remover the 2 doors in the center console and install an 7" alpine touch screen. Is anyone doing this? Pictures? My next question is how hard is it to replace my unit with a factory navi unit. Is there a person in this group that is selling a factory unit? If so i may be interested..it all depends on how intense it is to installand how expensive.