just check in CAR2PC website to see how it connects, you can NOT use this on BMW's at least that have DSP.
Not sure why you're posting. I am SELLING this, since I sold my BMW. I am not asking for your help figuring out how to work this.
And I had DSP in my stock HK system in my M3, and it worked fine. You just have to splice into different wires in the connector, instead of using it directly as is.
I was only saying so that buyers knew and then would not come back to you giving you a headache saying they want their moeny back because it doesn't work. Not trying to make it harder for you to sell.