87 300SDL, I've had advice given to me about turning the nut in the trunk, but it doesn't work. The sunroof is right before it goes up and closes. Whoever had it before me was lazy and left it down for who knows how long...

I tried wedging the back of the sunroof inside, but started tearing my headliner. I really need to know how to go about this... ANY help or ideas are greatly appreciated! Thank You!