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  1. Avin Avant 4 DIY for E39 with DSP (includes dual DVR & Back Up Cam!)

    E39 M5 and E52 Z8 Discussion
    Hi everyone! As the title suggests, I put together a DIY for the Avant 4 after installing it on my 2003 M5. I wish I had this guide when I was doing it because it took a bunch of trial and error. This unit is amazing. It communicates with your OBC and you can even customize the Welcome...
  2. Anybody install an XTRONS head unit in their e39? I would like any advice or input

    E39 M5 and E52 Z8 Discussion
    Hi all, I recently purchased a new XTRONS PQ7939BIP head unit and am looking to swap it out for the stock head unit. See link: I have seen other threads discussing the installation of these android head units but wanted to see if...