I have a 2012 S60 where the sunroof went into the vented position, and then quit. When I push the button forward, you hear the motor working like it's trying to pull, but it sounds like it's disconnected from something and the roof doesn't actually go back into place. I can hold that button and it just never stops. So it makes me wonder if its just come disconnected from what it's supposed to? Or is the motor bad and needs to be replaced?