To properly upgrade your software you should visit a BMW dealer and request them to update your Navigation software.

If you would like to risk upgrading the Navigation Computer software yourself, you can follow these instructions at your own risk:

Download your choice of BMW Navigation software from this link: http://www.e38.org/nav/  Unzip the contents of this file to a temporary folder using winzip or similar program. If required to use a CDKEY you can download it here. I think the CDKEY is only needed going from V16 to V22 on the MKIII Computers.

Download and installhttp://www.slysoft.com/en/clonecd.html Run the clonecd application and use the BROWSE feature on CloneCD to find the temp folder. ****NOTE: As an alternate to CloneCD their have been reports of another software that works just as well. This Software called is Magic ISO, and CDs must be burned at 2x speed and Mode 2 /XA. The Mode 2 /XA seems to be the important factor here as they tried all different speeds from 2x up to 24x at Model, and non of them worked. Magic ISO www.magiciso.com We do not know any details about this other software and have not tried using it, so you are on your own.

 

After launching the CloneCD software Select the Write from ImageFile button (under cursor above)

Use the BROWSE feature to find the IMAGE.CCD file that you saved in a temporary folder from the zip file

Select the IMAGE.CCD file

Hit the next button to copy the CDROM with your CDR Drive

Make sure and set a SLOW speed on the CDROM write speed. I was able to get mine to read in the Navigation CDReader using a 4x speed, but others have suggested 1x speed. Also use GOOD quality CD media. Hit the OK button let it burn a CD

Should look like this.

Download and print the following important installation instructions.

Install software update using the instructions above.
 

To Determine what software and hardware you have On the Main screen of your display, choose the "settings" selection. on the top right you will see the Computer version and software version: See image above SW 2-1/81. This means 2 = MKII ; 1 = single display (Not split screen) 81 = Software version 81, or BMW Navigation V 21 CD (or greater)

 Bimmernav Bluetooth Systems