Sirius and BM53 Question.
 

I am having Service Measure B65 209 04 (FM mode switching from Stereo to Mono/fading in and out) done tomorrow at my dealer. It is my understanding that with the installation of the new BM53 radio and the new software in it, that Sirius would now work in my X5 that has the MKIV NAV System. I am trying to convince my dealer that the new BM53 Radio would in fact work with the BMW Sirius Kit.

Any input would be appreciated.