Roof trim loose around rear window

[BoroughMark]

The roof trim around the rear window on my A3 convertible has come away from the plastic groove that holds it in place - is there a way to easily refit this ? Is there a particular position the roof should be open/closed when attempting to fix this ?  Thanks

[Steve Q]

Hi Mark, have you got any pictures? 

Is it a rubber seal.thats come loose? 

Cheers

Steve