I want to retrofit my 02 X5 4.4 with bluetooth (Build date 1/02) no nav no dsp. Everything I have read indicates having option s640 makes things much easier. I had my dealer print out the vehicle history report and no option S640, however in my trunk I have the black 25 pin connector and the blue connector therefore I assume that I am pre-wired for phone?? Does anyone else have experience with this situation.

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