I'm trying to install a conventional head unit in place of the "BMW Bavaria C Professional RDS" player I had. But there's a slight problem...



The image shows what is available in the car. The big connector in the car is missing all the eight speaker wires! Has anyone seen anything like this before? The audio system did work with the BMW radio.

The thick black cable is the CD changer cable and it has a 10-pin socket on the other side of the connector.

Also there is no antenna cable to be seen, nor is there an antenna socket in the radio. (Reception was quite bad...)

I have understood that both the setups, with or without an OEM amplifier, use the standard speaker outputs in the big 17-pin stereo connector... And I'm not even supposed to have an amplifier since I have the setup with only 6 speakers. What on earth is going on here?