I have a 2000 X5 with DSP and round pin connector for the CD player (but wires not connected to the ground signals, pins 8,11,12,14), no CD changer in the back. I could find one 3 pin connector in the trunk. I don't see the 6 pin one, is it hidden?
It looks like there are two types of DICE, radio and trunk option. Which one would work for my X5?