there's a piece of trim along the top this just pulls off i find pulling it from the bottom near the window is easiest that will then reveal 3 bolts for the spoiler there is 5 in total witch the other 2 you can see without taking the trim off there in either corner of the tailgate, then there's 2 metal clips again either side of the tail gate they go over the glass and spoiler i find that a flat head screwdriver will get these off, that's it dead simple

if you want to take the spoiler fully off then you will need to disconnect the break light first then when you have undone the spoiler move it away and you will need to disconnect the jet wash the pipe just pulls off