I have an '02 X5 with Navi and no DSP. At least once or twice a day when I would start the X5, the radio, on both AM and FM, would be on 570 AM or 87.7 FM ie it would reset to the bottom of the band even though there were no presets for this. Round and round and FINALLY the dealer got it to do it on command and they have orderd a new Radio Module. This should mean I can now add an Aux Input and/or Sirius right? With this config - '02 X5 and upgraded Radio Module, does this mean the Aux Input has to be done at the Radio Module at NOT at the Nav/Headunit? Does this also give me MP3 capability with the BMW CD changer, purchased in Dec 05.