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mark iv

  1. Upgraded Mark IV, country code reset

    E39 M5 and E52 Z8 Discussion
    After much research, upgraded the Mark III nav unit in my '01 to a Mark IV. Upon installation, found the Mark IV had a custom splash screen, upon further research, downrevved from V32 software to V30 then back to V32 to remove the custom splash image. Somewhere along the way this appears to have...