I have a 2005 R51 with the non-BOSE audio system. I have the 6-CD changer with navigation.
I'm wondering if it is possible to connect my iphone to the audio unit in any way? I don't need to be able to control the iphone via the head unit controls. I just want to send audio into the system, so I can listen to spotify/podcasts etc on the road. I want to avoid using an FM transmitter as they never work well.
I removed the audio unit to see what spare ports there might be on the back.
I was hoping for a simple RCA auxiliiary in. But the only spare port was a shape I haven't seen before.
I have added an image of the back of the head unit (see below).
Does anyone know what this empty port is?
Or any other advice on getting auxilliary audio into this non-BOSE stereo would be great.