If you just want to remove the headliner on the sunroof itself, thats an easy job; open the sunroof 1/3, pull the headliner at the front (firm), when it's loose remove it true the sunroof.

To replace the seal on the back of the sunroof you have to take the sunroof out completely.

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1979 Black on Black, 300CD (sold), 1990 Black 300SE, Silver 1989 Volvo 780, 1988 300CE (vanished by the hands of a girlfriend), 1992 300CE (Rescue).