Yes, they need to remove the headliner to do there testing I would go back and show them the problem, here is the wiring diagrams for the sunroof so you can see how it works and I have also included the sunroof components, so you know where they are. Check out the images (below). Please let us know if you need anything else to get the problem fixed.
Images (Click to enlarge)
Friday, September 9th, 2022 AT 4:41 PM