Here is how to properly fix your sunroof, without duct tape. You will need part n° STC773, very few tools and a clear sky, to perform this replacement. Very easy, although a bit of a fiddle.
Note: the front and rear seals are identical, so you might as well order the pair.
Find the parts here:
https://www.johncraddockltd.co.uk/land-rover-discovery/parts/body-and-fittings/glass-and-regulators/stc773-sun-roof-seal-for-manual-operated-from-ka034314-not-sliding-sun-roof.html
Let me know in the comments if you would like to see how to replace the seal in between the sunroof frame and body… It can also be a source of water ingress.
Bio: I am a professional mechanic, focused on classic cars and bikes. I also write classic car reviews for an automotive blog, and provide “how to” type videos, to help the mechanically minded DIY’ers take care of their cars and bikes.
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Very good video what about an electric roof which is different from this