I've got some questions about the Midcity programmer versus the NAV-TV module.
If I understand correctly, the Mid-City programmer can be re-used on multiple vehicles, and does not need to be left installed after the re-programming occurs?
On the other hand, the NAV-TV module must be left wired into the vehicle. I spoke to NAV-TV and they claim that one advantage of their product is robustness against possible "un-programming" by a dealer. For example, if you visit a dealer for some random reason, and they do a vehicle firmware update, it would conceivably reset your vehicle to the original settings where the Audio 15 doesn't pass through the camera signal. With NAV-TV installed, you can go through the programming options again to recover your camera signal.
A third option is some aftermarket installers claim to permanently reprogram the Audio 15 to accept the camera signal. Has anyone done this? Do you worry (or have you experienced) a loss of the camera signal after a dealer service visit?
My goal is to have a backup camera that is seamlessly integrated with the Audio 15 unit, shoes automatically in reverse, no switches, etc.
Lastly, can anyone identify an installer in the Seattle/Portland (or worst case, SF bay area) that can do this re-programming? I found one in Philadelphia that came w/ high praise/recommendation from the local MB dealer, but that's obviously too far.