I used an idatalink Maestro RR with my Kenwood head unit (DMX7704S), non-JBL '06, and, with no experience doing things like this, got it all right the first time. It has worked flawlessly since. It retained full steering wheel controls. I also added the Bluetooth button to the steering wheel and it incorporated that into the system flawlessly. I primarily use Android Auto through the Kenwood head unit without any problems.
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