Can't for the life of me, figure out how to change the 3rd brakelight in my 1993 W124. I've tried accessing it from the trunk, pulling the two halves apart, and looking for screws/clips but can't find anything.

Also, is there a way to remove the body of the light also, the rubber seal that allows it to rest against the rear window has become bunched up in one corner.

Thanks in advance.