Pull out the ash tray
Stick your hand inside the opening and start yanking top of the opening.
There's 6 clips total that hold that trim piece in.
It helps to have the shifter in L position for more clearance. Make sure you're on a farly flat surface or set the hand brake good so the car doesn't move...Either that or chock the wheel or something. Car rolling down the hill while you're trying to put in a stereo is not fun. -- Don't ask. :ugh3:
After you remove that piece, you'll need a 10mm socket and a philips screwdriver.