Thanks for the response but your not going to use the factory radio or the changer because the after market unit is going to give you better sound. Remember that the unit will do everything from radio to dvd cd nav. I could see the possible the direction of the warm cold air and maybe speed of fan I guess i think its a small thing to loose for the benifit of an upgrade. The modifications I have seen the completely relocated all of your fan controls to the glove box which seems much more inconvenient. I do appreciate you response though.
Sincerely,
Dan