I have the standard audio with single CD in the dash. I've read thru a number of threads and it looks like BMW doesn't make it easy to upgrade to NAV.

I really would like to have the NAV but it looks like a royal pain to upgrade.

I would also like to add a 6 disc changer, and would like to stick with factory as I have service contract. To install the 6 disc changer, I found the plugs, and found that I don't have the mounting brackets...... how difficult will it be to find a factory CD Changer with brackets?