Is that its purpose?
Mine doesn't seem to be snug/tight around the sunroof aperture I can quite easily slip a credit card down between the sunroof seal and the roof when it is closed.
I appreciate it isn't going to be a perfect seal, hence why there are drip trays, however looking at the sunroof when its open, there is little to stop water running past the seal and down the inside of the glass.
Mine seems to have an awful lot of condensation which drips off the sunroof on to the centre console, surely that isn't normal?
Other sunroofs I've looked at have what looks like a draft/wind noise reducing strip just and a seal that goes around the cassette to stop water running inside, however the P38 doesn't have this?
This is a R50 Mini sunroof my R50 has a pano roof and i near 20yrs old, no rust and it is 100% water tight
note the 2 seals.
I was thinking about putting a draft excluder or a 2.5mm rubber strip to help plump up the seal?