Ok so ive done a few things, and still having just crazy wierd problems.
I had a full test ran on my car, full electronics, full engin, NOTHING is coming back bad, no leakage, no bad belts, no bad alternator, no bad battery, nothing, BMW cannot find a SINGLE problem with my car. But every week i have to have it jumped, it last for a week then dies again. Ive tried now this week having everything unplugged that i possably could, no difference. Ive unplugged my amp and subs all together, put in my stock lights (disconnected the HIDs) took the stereo out. so basically ive tried running the car with less power then needed in the stock. I still have the problem. Ive noticed though that whenever i push a window up or down button, the lights go EXTREMELY dim and the RPMS drop big time. And what I believe is the alternator is making a really wierd sound when i do this. Im stumped, BMW is stumped. does anyone have any ideas what it could be?