Extremely loud bangs, like gunshots, seem like from front edge of sunroof, repeating about every 10 seconds, several times per incident. has happened several times over the past 24 months (2015--2017). so far, the glass has not broken. vehicle is nearly always parked in an outside parking lot with ignition turned off when it happens. however, twice it has occurred while driving straight at moderate speed on city streets. sliding headliner under sunroof has always been closed during these incidents. note: the required date typed below into your standard format report, 01/01/2016, is meaningless.