The wiring diagram for all the wires and connections running to the trunk. I'm not sure yet if the wires going to all of the stereo, speakers, DSL, Navigation, etc... are connected in anyway to any other components of the car. Plus I would like to send whom ever I sell the system to everything that's included. After giving it some thought, I figured if I'm pulling everything from the trunk, the head unit, and all the speakers, might as well include all the wiring, harnesses, and pods for the speakers. That way I can keep all together as a all included package. I guess my next search will be to find out what to do about the fuses that were dedicated for the stereo. If they share fuses with other components of the car and are absent will that be ok for the other components? And what will it do if that's the case? Send more power to the remaining components? Not affect it at all? And could I use the fuses for my next sound system? I'm not an electrical wiz at all. And this is one of the most confusing cars I've ever owned as far as working on it myself. Honestly I want to rid the car of as many of it's electrical problems as possible. From the strange light flickering and staying on problems, to the alarm going off for no reason, to the sound cutting off after 15 minutes (which use to be would turn off when the rpm was under 2000) and so on and so on.... I could live without all that. I feel it takes away from the great performance and character of the car.
Forget it. No, really, forget it.
While it is possible for you to pull the harness and provide it to someone, you'll need to disassemble the entire car to do so since it runs from the rear left corner across the back, up the sides, down the middle, and across the front. In other words, it covers the entire interior of the car.
No one except a BMW owner is going to be able to make use of the components you have, and even then, it will only be someone who has the same basic setup - e.g. an IBus vehicle that is pre-wired for, or already has, navigation, etc. Anyone else will find that your components cannot talk to their vehicle either because a) they don't have IBus on their vehicle, or b) the components are ever so slightly different and do not physically fit.
Even still, there will be plenty of eager buyers for your components as our cars are getting older and the components periodically fail.
ps. Speakers probably aren't worth selling, but give it a try anyway