You can try to adjust the striker. On my 95 you can bend back the rubber bumper trim to reach the two 13 mm. nuts underneath to loosen it, and move it around some. In addition you can adjust the rubber bumpers on the sides, that hold the hatch out against the latch. You should also check for wear on the pin itself. If it's worn you could try turning it 180 degrees, but if the wear is too bad, or the latch is also worn, you won't get rid of all the rattle. If you adjust it too tight, it will be hard to latch and hard to unlatch, but it will still rattle if the pin is worn because it flexes sideways as well as in and out, especially if the hinges are a little worn too. There's a delicate balance between tightness and ease of latching, and once it's badly worn you may never find it.