My moonroof/sunroof rattle has been driving me nuts. I too could push up on it to make the noise stop.

I tried all the gaskets and tubes around the bars in the assembly. I tried using more grease. I tried three pieces of felt under the front windscreen.

None of them worked for me.

I just now used electrical tape all along the back of the moonroof metal opening. I placed three strips from the middle of the driver's side to the middle of the passenger's side. I then placed one more the length of the back side. I sprayed some white lithium grease on a paper towel and applied to the moonroof gasket and the electrical tape.

I live on a long gravel/dirt road in Idaho with more potholes and washboards than should be legal.

Totally fixed the rattle. Absolutely no noise whatsoever. Thanks for the tips and the forum.