A shame to see so many samples with hideous accretions of sealant or duct tape on the roof when a little cleaning would keep things draining nicely. 240 had the same problem. Volvo would have been well advised to have placed a sticker on the wind deflector w/some words of advice.

Just to clarify, there are four drains, one at each front corner (easy access) and two in the very rear of the roof retraction area (hard to access). IIRC it's possible to clean the rear drains from the other direction by removing trim at the bottom of the rear window, not as good as coming from the top but arguably better than no cleaning at all.