For my BMW 320d Touring I was looking for an affordable solution. Due to the good review I bought this kit. And what can I say. That part is perfect. I have in my center console an AUX-in connection and a 24V connection. Both ends connected microphone attached with "Fernbedinung" directly to the center console and tested. Enabled on your iPhone 5 Bluetooth and after a few seconds the device was connected. Stream music works without disturbing noises or disconnections, also easily make calls. My interlocutor said that he had heard no response, but you can hear it clear that there is a speakerphone. The quality is still good to very good. If the ignition is switched off, the device is disabled. The next time the engine is started, the device automatically activates and connects again properly with the phone. All in all, that's what I was looking for. Therefore, I can ausprechen unrestricted buy recommendation.