Replace the headliner in a Jaguar if it starts to tear or sag in the centre. This is a moderately difficult task that can be performed with common household tools.
Unscrew the individual, silver bolts in each corner of the Jaguar headliner with a wrench. Feed, carefully, the loosened Jaguar headliner through one of the back doors within the Jaguar.
Wipe the scraps of glue left on the exposed roof of the Jaguar with sandpaper.
Spray a thin, but covering, layer of adhesive glue on one side of the new Jaguar headliner. Press the Jaguar headliner on to the roof of the vehicle.
Cut all, if any, overlapping headliner material with a pair of scissors. Screw the individual bolts back into their respective corners in the Jaguar Vanden with the wrench.