I just purchased a used E53 2005 X5, I have been pouring over these pages trying to find update information on the Nav unit. I think I have figured out the .v32 is the correct firmware. I am sure it is here somewhere but I can't find out what the most current map disk is can someone let me know what the BMW part number is or navteq disk part number? It appears I have an MK4 nav system.

Thanks

james