I just got done redoing the sunroof on my '86 535 and am just getting it operational again. I noticed that the position of the limit switch/cam wheel on the motor assy must be in a certain attitude for the buttons to operate the motor correctly, ie. stopping at the correct position . At what point must the cam wheel be positioned to start the sequencing correctly??? BTW, after a complete tear down and reassy of the sunroof and all it's parts, I am not afraid to tackle a sunroof problem again. I was really dreading tearing into this one, but it turned out just fine. TIA,