I've removed the headliner and sunroof to recover both but reinstated the sunroof cartridge only so I can still drive about. I don't think it leaked before, nothing obvious anyway but there was some staining. Anywhoo, we've had persistent rain overnight after a long dry spell and the wife was non to pleased to have water dripping on her lap at 5.30 this morning lol!
Back home after dropping her off and using a torch I can see water between the foam seal and the internal surface of the roof skin. The seal isn't sitting correctly in relation to the rest of it so I guess that's the issue.
Thinking about it further , im not sure water should actually get there unless there was a real heavy downpour that the drains couldn't cope with? All drains were cleared, they weren't blocked anyway tbf and the drain pipes reattached tightly to the cassette stubs, the waters getting in above the stub , nearside front, anyway , passed this foam seal. I assumed this seal was just for draught proofing but now I don't it must be a secondary water seal.
Bit of a bummer because it's heavy and it's got to come out again. Anybody know the part number for this foam seal ? I can't find it listed.
Tia.

Thinking some more...(I've never owned a car with any kind of sunroof until the 38) maybe the roof isn't enligned properly so the rubber glass seal isn't quite right. That makes more sense. I'll have a look later when it stops chucking it down. I've found THAT seal online at a price of course...

My drain pipes - and I assume many others - were full of crap and gunk at the very bottom, where there is a concoction that looks like a rubber flap/valve. This does not allow bigger debris, like leaves, to pass, and it clogs the flap/valve, and the water level ... rises.
I removed them all entirely, I never understood their purpose anyway.

About "raining in", once I left the sunroof slightly open in the tilt position, and got a stain inside after some summer rain with wind. Curiously, my mate's Audi was parked in the same position with the sunroof opened as well, and got nothing in. Teutonic supremacy?

If I blow down the drains with an airline, how likely am I to pop the hose off the bottom? I don't have a flexi-rod to hand at the moment... if there's a significant risk, I'll get one.

It's what I did. You can hear the air coming out clearly.

Morat wrote:

If I blow down the drains with an airline, how likely am I to pop the hose off the bottom? I don't have a flexi-rod to hand at the moment... if there's a significant risk, I'll get one.
RR:

You can just use an old length of power flex...but air from the top just as good