BMW M5 Forum and M6 Forums banner
mark iv
1-1 of 1 Results
  1. 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...
1-1 of 1 Results