Has the motor been replaced recently? It sounds like it wasn't installed correctly. I don't quite understand your statement about the moonroof being fully open and then opens more. Are you talking about when it tilts up? It can only slide back so far... Anyways... the motor should be installed with the glass in the closed position. You might have to play with the motor positions to get it to work properly when you install it, but once you are done, it should open fully with the button, close fully when you press the button, and then tilt fully when when you press it the same way again. So, if your roof doesn't close all the way the first time you press the button, leave it where it stops, then uninstall the motor, crank the roof closed by hand (pliers/vicegrips...etc...), and then re-install the motor, and it should work properly.
