Reinstate the panoramic sliding roof panel and the Merceders E-class door-class W211 if the panoramic sliding roof panel is opened only by ropes or has been disconnected or discharged from the battery.
First, remove the safety of the panoramic sliding roof panel from the main fuse box. Insert the fuse again. Ensure that the ignition key is in position 0. Completely close the sun shield. Do not release the check box for another second. Fully open the sun shield. Do not release the check box for another second. Completely lift the panoramic sliding roof panel. Do not release the check box for another second. Completely close the panoramic sliding roof panel. Do not release the check box for one second. Check the function of full opening of the panoramic sliding roof panel.
If all the measures taken have not resulted in the desired result, it is better to call the Mercedes-Benz service centre.