Unfortunately didn't fit it myself, the
dealer who ordered the grille in kindly fitted it for free for me, bless em.
Having looked at me old grille there are two bolts that go in at the top, a push in clip either side and 2 poush in clips on the bottom.
So it looks to me that once you have removed the 2 bolts at the top, it should come off.
Don't quote me on that though, nothing is usually that easy.