That is a great success story.

Out of curiousity, did you gain the Aux input as well?
Does it fully mute the radio during navigation instructions, or partially attenuate (in other words, can you hear the radio while it is also giving navigaiton instructions)?

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2000 E38 750iL Highline Edition, Upgraded with the lastest 2006 X5 Electronics
MKIV Navigation, 16:9 Display, Bluetooth, TV/Video with Backup Camera, Sirius, and Aux Input