I am having trouble with the sunroof on my 1999 E300. The roof panel opens two ways: A-the rear tilts up and B-the panel retracts into the roof. The sun roof opens fine in either mode, depending on which direction I push/pull the switch. But the switch will not close the panel from the open position in either mode. The only way I can close it is to try to "open" it in the opposite mode and stop just when the panel seems to be closed. This is pretty crude and I can't tell for sure if the roof is REALLY closed. I keep the car in a garage but am reluctant to drive it in the rain! I had this problem a few months ago and a tech at the MB dealer "re-set" (his term) the thing while I watched but I have no idea what he did. The problem sounds like something is wrong with either the switch or whatever controls the mechanism if it is not the switch. Is there something I can do pretty easily to "reset" it before taking it in for repair?