I don't know if your car has the glass roofpanel or not, but I just removed the sunroof liner on my 94 C280 the other day so I could adjust the roof panel. If you have the metal roof panel all you have to do is open the sunroof partway. On the front lip in between the headliner panel and the sunroof panel are two white snaps. Once you unsnap these two pins you will be able to slide the headliner towards the front of the car past the sunroof itself and then up and out of the sunroof opening.