Is your switch flashing?

There is a switch that tells the cover that the bow is raised, it's on the right (passenger's side) it sounds like it is not getting activated. I tried to find a link for you it's 77-435 in the factory service manual. You would not have has any need to touch it in what you did.

Another suggestion, retract the top manually and see if it will close with the switch, if so then try to open it.

You may have a stored fault code that you need to clear.

Edit here's the link http://w124-zone.com/downloads/MB%20CD/W124/w124CD2/Program/Chassis/77-435.pdf