I have a panoramic roof the one which splits in two. The one at the back the small section is not closing or moving at all

. The front section opens and closes no problem

. There was a crunch when the roof was closing

. I have taken it to a garage to get it under cover and for them to have a look. I am looking to see if its possible to close the back section permanantly or until it can be repaired. it is a non BMW garage so any help would be grateful.
Thanks in advance.