When I changed my red one to a clear version I found I really had to press it home hard to get it to engage properly, almost to the point of fearing it would break, maybe some are just not seated correctly? Regards

David

Lovely i6 has now gone, but not me......

Please let me know if anything in my post offends you, as I may wish to offend you again......

It’s quite a positive click in so I think it’s seating properly. Maybe I should have cleaned more of the old glue off, but got as much as I could with solvent. The rest would have to come off with abrasive paper !.

When mine started to leak, I bought one of the seals of ebay but never fitted it. When I took the rear light of it was pretty dirty so I cleaned it up and where it sits, let it dry out completely then sprayed it with silicon to see how that went. Hasn't leaked in the last 6 months. 
Hung like Einstein, smart as a horse.

Just put some duck tape (2 layers) directly on to the metal of the door around the opening , as Jack Frost suggested and it’s a much tighter fit when you press the light home, so hopefully that’s it . If not, it’s the e profile window seal as the last attempt. What a poor design !

Didn't work ! E profile window seal strip next . final attempt before having to buy a new light at ~ £50 !!

With yesterdays rain I discovered a small puddle in the boot, looks like a resealing job is needed. MY13 HSE Lux Santorini Black Gone
MY11 HSE Santorini Black Gone
MY08 SE Blue, Gone
Alfa Romeo GT Gone
Alfa Romeo 156 Space wagon Gone
Volvo V40 Gone
Volvo 480ES Gone
VW Sirocco GTX Gone

They really are a rubbish design

I used this on a window this week and am going to seal my high level light with it.
https://www.screwfix.com/p/no-nonsense-x8-...90ml/912fr

That looks a bit permanent though . Might stick the light on to the car permanently ?

You could get a knife under the edge and peel it off if needed.

I guess so, but I'm going to try the E-profile window seal tape that Westville on here recommended and see how that goes.
Will have to clean all the gunk off the back of the light first to make sure this window stuff sticks to it. Its rubberised sealing tape so shouldn't let any water in if attached properly ???

As someone said above it really is a crap design.
Edit lol it was you

I hope I'm not wearing the retaining clips out ! - it's been on and off so many times and I worry about the designs !!

Still leaking a bit after the e-profile seal. Ive really had enough of it now

New one ordered - I really have had enough of this one and my time taken trying to fix it