Change Standard CD Changer for MP3 CD Changer
This site suggest i need BM53/BM54 radio unit to enable MP3 support (65 12 6 988 276)
Range Rover Bluetooth Installation instructions
Best Sellers BMW Latest Version BM53/BM54 Radio

But this site says the MKIV DVD Nav Computer allows support of MP3
Nav System Upgrades for Range Rovers

Can i just but the MP3 CD changer and plug and play with song information on the nav display?

Car is a 2004 E46 M3