Opel ASTRA Owner's Manual page 42

40 Keys, doors and windows
General hints
Safety function
If the sunroof encounters resistance
during automatic closing, it is
immediately stopped and opened
again.
Override safety function
In the event of closing difficulties, e.g.
due to frost, hold the switch r
pressed to the second detent. The
sunroof closes with safety function
disabled. To stop movement, release
the switch.
Closing sunroof from outside
The sunroof can be closed remotely
from outside the vehicle.
Press and hold e to close the sunroof.
Release the button to stop the
movement.
Initialising after a power failure
After a power failure, it may only be
possible to operate the sunroof to a
limited extent. Have the system
initialised by your workshop.