Assuming that you are talking about the defroster grill on top the dash, nothing really in there that would break. I used a screwdriver and easily popped it up.
The rattle on mine came from the vent tube that sits below it which had come loose. Once the grill is off you can stick your fingers down in the tube and pull it back up. I put a couple small pieces of heavy duty double stick tape in there and it has stayed put ever since. No more annoying rattle (from that at least).
I have a weird squeaking noise coming from the back deck lid area. Almost like the rubber seal is rubbing against the deck lid and making the noise...Once you fix the rattle up front, tell me if you have the squeak coming from the back : )