The issue stems from the primer applied before gluing the optional light bar to the windshield (no fasteners are used in the attachment of the light bar). Is that typical in the industry, parts or components being glued onto an exterior surface instead of fastened?
Its even stranger because presumably the light requires a wire for power, so using an adhesive doesn't allow them to avoid making at least 1 hole in the roof. Perhaps it's about minimizing the installation cost at the dealership. The irony is that you'd imagine that an off-road roof mounted light would be something that you should be able to tighten when you are ... off-road. I guess field serviceability isn't a desi…
There just isn't a lot of options other than adhesive for installing a light bar considering the windshield consumes all of the forward facing real estate (as the roof slopes back from the apex).