Arne,
In order to remove the rear hardtop locks the pins need to be removed. They can be pulled out but, do it very carefully or you will brake to latch. I understand that is an expensive part. Once the pins are out the plastic cones can easily be removed exposing a nut which will release the entire latch mechanism. It is a good idea to replace the plastic cones while you have this in pieces.
Regards,
Ted
1969 280SL
In the body shop being re-painted