Yes chimes are tied in through the radios amplifier, there's also no ignition hot (yellow) since the radio gets a serial input to turn on and off. It also sends data to the HUD to display info there as well. Every option I have seen hasn't retained everything. You either have missing date (even with remote installation of factory radio in trunk and under the dash) weird/ dead gauges. Steering wheel controls that kinda work, and other small issues. Up to 03 were cake I used to install those without having the car handy. Crimp on a harness slam it a kit and remove old install new. These 04+ are picky.
Jeff
