Cadillac 2007 XLR Owner's Manual page 130

12. Manually move the front tonneau to the open
position. Once the front tonneau is open, fold
the side wings in by gently pressing them
in. Do not force the wings. If they are hard to
move, make sure the front tonneau is open
all the way.
130
13. Reach in from the side of the vehicle and
under the top to remove the headliner plug.
The plug will be located in the center of
the top near the front.
14. Insert the wrench into the bolt beneath the
plug location. Turn the wrench about
one-quarter turn counterclockwise until it
stops while gently pulling up on the center of
the top to release it.