P10 Sunroof need some help

[Brian Jones]

Well, the problem im having is that the drivers side portion
of the sunroof looks like its catching on something and its not
closing, however it is opening properly with the motor running.
The pass side closes fine.  I called infiniti they said that the
whole assembly needs to be replaced at a tune of $500+ ..hmm i
dont think so.  Please anyone know whats wrong and what I could
do to fix this?  Thank you in advance!

-Brian Jones
93.5 G