Dead battery leads to weird blue interface on sat nav screen

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  1. Dead battery leads to weird blue interface on sat nav screen 
    #1
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    M5_e39_Individual's Car Details
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    Hi all. I let my E39 M5 battery run down (I know, I know!)
    I jumped it back up and it's been running fine mechanically.
    Only weird thing is that the computer / sat nav has gone all lo tech and blue / yellow colour as compared to normal BMW black and grey etc. I'm not sure the BMW logo is showing either - generally acting weird.

    Anyone else had this issue? Would like to avoid taking it in to BMW.

    Thank you !
     
     

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    #2
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    The nav unit is busted. The nav unit produces the layout on the screen. If the nav is not working, video module will produce that alternative layout and you won't see "Navigation" as a selectable item on the screen. If you have the CD based Mk.3 nav unit this is not the first time it's corrupted by jump starting.
     
     

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    #3
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    Ouch. Just spoke to BMW and new unit in excess of 2000 quid. What are my options? I guess speak to breakers.
     
     

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    Yea, you should be able to pick up a MK3 unit and just plug it in.
    I've done an upgrade from mk2 to mk3 and that was simple, no coding or set up needed. MK3->MK3 should be the same.

    Hopefully you'll find some used MK3's from people who swapped to MK4.
     
     

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    #5
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    Does that mean I can do an upgrade to mk4 at the same time? Could that be a silver lining
     
     

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    Yes, it should be possible, I got my MK3 from a mate who went mk3 to mk4, and as far as I know, there were even less differences.

    mk2 has a separate GPS gadget, and the MK3 has one inbuilt, so my mk2-mk3 swap meant I had to unplug the aerial or something like that. I have a feeling mk3-mk4 doesn't need anything special done, but certainly there isn't going to be any major stumbling blocks.
     
     

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    #7
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    Yes, Mk3 -> Mk4 is plug & play. Mk4 has so much faster processor that I wouldn't even consider Mk3 if you ever use it to actual navigation, not just for screen layout.
     
     

  10. Installation 
    #8
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    Thanks for your help guys. Do you think this is an easy enough job to replace the unit myself? I have a passing knowledge of electrics in terms of changing bulbs, wiring, and light stuff.
     
     

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    #9
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    Yep, it's in the boot once you pull the carpet away, and it's likely to have a bracket or two to hold it down, but it's not going to be more than a couple of 10mm nuts and then just swapping the electrical plugs.
    Remember to eject any discs beforehand if that still works.
     
     

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