So I have had leaks coming from my sunroof for a while now. I had thought until recently it was bad seals, but of course a little research told me the seals aren't meant to keep water our, and either my drains were clogged or the pan had rusted through.

After determining that the drains were clear I went ahead and took the entire sunroof assembly apart, though I have yet to find an angle in which I can remove the pan through a door, so its just sitting in the car. Every corner of the pan is rusted, though the drain nipples themselves are intact. I was thinking of doing a temp fix with either bondo, silicone calking or both.

What I want to do is find an intact replacement to swap in. I have found very little info about replacing the entire pan, and am unsure what models/chassis will fit my 79 W116. Ive read somewhere on these forums that someone took a manual sunroof from a w123 to install in their w116 300sd. Will the entire assembly, pan and all swap in these models?

Any advice or info is helpful. I'm pretty much wingin this.