OEM Sirius Problem plus Whine / Noise

[Rev Z-Man]

Ok, I give ... I'm having issues with getting my OEM Sirius unit to work. I have a 2001 X5 with a production date of 12/00 and yes, I've read all of the docs on the front page, which is why I'm posting here now. I bought the unit with the PN 65 12 0 398 140 and it seems to have power as I can hear my CD Changer power-up. However, besides not having SIRIUS come up as a selectable MODE, I have the dreaded Tach Hum Whine Noise. Seems like I've isolated it to the 3-wires in the 6-pin harness (I have tried 2, one from the auction I won and a brand new one from BMW.)

Any ideas for the hum? Maybe I can loop in a power lead magnet coil or ground the whole Sirius unit ... maybe better shielding on the cables?

I'd rather not lose CD Changer functionality and I'd like the whole scrolly thing to work as it does in the FM band.

Here is the info from my radio:
SN Y464039_
SV 46-00 50
RI 00
GAL 1 (MIN)
95.9 13 15
DSP 0 V 05
TP-V 0
AREA US (Even tried resetting this to CANADA and back to USA to no avail)
AF OFF


What would happen is I installed a newer MID that was DSP-compatible? Would my whole system balk and not work if I didn't have the rest of the components?