One more suggestion for clearing the sunroof drains. If you know someone who has an air compressor, the drains can be safely blown out using the correct size attachment to fit in the top of the drain tube. Perhaps you know a mechanic or have a mechanically inclined friend??

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Will I buy another Volvo??? We'll see....

Thanks for the kind words, Kitty. If the sunroof seal has separated or is damaged then that's an issue I haven't had to deal with. People think the sunroofs are supposed to be a water tight seal, but that's simply not the case. First thing is to ask if the panel at the rear lifts up flush to the roof when fully closed. If not then there's a loose nut on the side rails that needs to be tightened. If water is a problem then all four corner drains of the sunroof tray pan need to be inspected and cleared. Like you say, here in the Pacific Northwest it doesn't take much for a wad of pine needles or whatever to block a far corner of the tray. Lots of info here and elsewhere can be found on inspecting and clearing the drains.
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Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now

Dear Kittysgreyvolvo,

Hope you're well and stay so. I cannot help with sunroof issues. I never thought a sunroof was a good idea, so have never owned any car so equipped.

That said, to clear the drain tubes, I'd use a piece of soft steel wire, and bend one end to double it - about 1/4" (6.5mm) - so that the tip is rounded. Use a file to remove any sharp or rough edges. The tip should be as smooth as possible. That reduces the risk of punching a hole in the plastic tubing.

I've used this device to clear blockages in the air-conditioning system drain tube (that protrudes slightly from the firewall, just below the aluminum air-conditioning evaporator/drier canister).

Hope this helps.

Yours faithfully,

Spook