Your symptoms are very similar to many that have had problems with this assembly. Does anyone here have those handy and can post them? There has been much discussion about this and there have been some that have posted engineering exploded parts diagrams with lube points for the pano roof. Search the forums for the panoramic roof. Its not cheap (of course) but its much better than just spraying silicone on it. I dont have the part number in front of me, but Im sure that there are others on this great forum that have that information at hand. There is a specific grease that MB recommends for the pano roof. This won't take you long, and hopefully it'll fix your problem. Once you can actually get the roof open, you'll also want to clean the tracks with alcohol or WD40 and then regrease them with a good quality synthetic axle grease. It took only one washer on the one mounting bolt I could access through the sunroof control pod to fix the problem with my roof. Try putting one of these washers on every mounting bolt you can without removing the headliner, and see if that fixes your problem. ![]() You could either try calling the Mercedes dealer to see about picking up new rubber mounting grommets for the sunroof motor, or just remove one of the bolts and go to your local hardware store and pick up 1/4" lock washers that'll fit on the bolts without overhang. If you can't, see if you have these same rubber grommets built into the mounting bolts that the panoramic has. If this is the case, try to torque the motor's mounting bolts. Turn the key on, and actuate the sunroof button while watching the motor and look for excessive movement especially where you see the motor being pushed away from the gears it's supposed to be driving. If I was you, I'd first open this panel leaving the sunroof switch connected. I don't know what the regular sunroof layout is, but most models that I've seen (VW, Audi) always have the panel you can remove to access the motor that drives the roof panel so you can crank it shut in case of emergencies.
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