I have tried to remove the grille in my '02 Navigator too but I've been unable to. It just is not coming off. It seems the whole panel has to be removed even though I just want to take a look at the subwoofer and maybe disconnect it.I actually just wanna take out the sub. Have a 3 year old daughter so dont to bust her ears. Would rather have a empty compartment for storing napkins, paper towels, wipes, etc.