The two privacy/sun blinds (front and rear) are held "closed" by a peg and clamp arrangement.
The peg is on top of the blind draw bar and the clamp is adhered to the glass of the roof (front and rear).
The clamp consists of a pin-and-spring mechanism to catch and hold the peg.
The problem is that the pin-and-spring arrangement gets stuck with time and doesn't work as well as it should.
Or people tend to be ham-fisted and just wrench on stuff if it's stuck.
Typically the handle breaks off the draw bar or the clamp is ripped off the roof glass or both!
If you still have a fully functional sunroof treat the handles and clamps with respect!
If it takes a bit of force to release the blinds you can pull gently downwards on the handle and draw-bar until they are free of the clamp and guide the draw bar to the center of the roof.
For the front blind you can also set the sunroof control to 1. The sunroof will pop up and release the blind.
Don't slam the handle and draw bar into the clamp, the handle will break!
You can "exercise" the pins in the clamps by using a screw driver. If they are stuck you could try some moisture displacement spray. The pins should spring in and out.
