[daddyo8]

My son recently had the same proplem on his 99 328i driverside reardoor window. His problem is the plastic holder which attaches the cable to the motor gears to the window rack. the plastic broke. He just went online and got a new regulator w/o motor @ $70-$90 depending where you go. I saw one on ebay for about $56 but he didn't trust the vendors on ebay, so spent a little more for a Bavauto unit. He'll be installing it this weekend if weather holds up. Right now he has a block of wood propping up the window from the inside of the door frame. Took about a week for the part to get here, average time, not too bad.
Good luck