I almost forgot that if you need to remove the 2 sliding brackets that hold the sunroof up it is held together by 3 bolts on each side. I circled them in the second photo. If you remove the bolts on each side you can pull off the sections individually leaving only the part that is connected to the cable that goes to the motor. All bolts are 8mm. Also there is a plastic siding held in place on the lateral sides of the sunroof opening held in place by 3 Philip screws that need to come off before the side sections can be removed. The side sections also have these rubber sliders on parts of the guide sections that allow it to slide along the railing. May want to replace all of those while at it. I wasn't aware of them until I had the roof off and was reinstalling the new one, but luckily I had some that were in decent shape from the one I pulled. If anyone needs further help with trying to tackle this job pm me. Don't forget to lubricate the rails with grease when finished or in my case I just lubricated the rubber sliders.

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1990 190E 3.0L