I already have it longer time in usage: A BlueBus interface.
What this nice piece of equiptment can do and why it is the solution to bring your E46/E39E38/E39 on a whole new level will be covered in this video!

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Content:
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00:00 Intro
00:22 Was ist das BlueBus überhaupt?
06:28 Installation
08:02 Menüführung am Beispiel großes Navi
19:56 Fazit
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Social:
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Altblechkutscher Garage #ABKGRG​​ on Instagram:
  / abkgrg  

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Music in this Video:
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Musik von Aries Beats
Link: https://free-songs.de/my-music/

Neptis:
  / neptismusic  
  / neptismusic  
  / neptismusic  
  / neptismusic  

Music from Soundcloud
Music provided by RFM:    • Video