Rear Sunroof Drain Clogged/disconnected, Leaking Into Car

[volvogeek]

I've searched high and low, and I can't find anything that goes into either how to unclog the rear sunroof drain on a 855 nor where to look for it under the headliner.

So...here I am. The problem is that I'm getting moisture on the lower edge of the headliner from the front passenger-side window all the way back to the rear of the car. It ends up dripping out of the hangar hook hole and then accumulates in the spare tire well. I thought that there were holes under the trim strips for the euro roof rails, but a half-hour in the freezing cold and wet proved me wrong. There ARE holes for the door-mounted roof rack that don't have any screws threaded into them, and I could try plugging them up - but it's the same on both sides and ONLY the passenger side is leaking.

Is getting to the drains only a matter of removing the grab handles and pushing back the headliner? Again, I've searched 'till the cows came home, and I've seen nothing that indicates any kind of procedure. I'm new to the 850 world, I wouldn't hesitate a bit to tear into one of my 240's - of course I'm not paying for them anymore, either...and technically the bank owns the 850, so... Heh.