As yours already has the roof bars it would be a lot easier than when I did my car as where mine is a Pop it just had the plastic strips the whole length of the roof, the roof rails are in 3 sections, the back bit unclips, the front bit unclips but will also have a small adhesive strip at the front, with the front & back sections unclipped it will reveal a bolt at each end, undo & it should lift straight off with no trouble, when I fitted my rails I didn't use the factory bolts, I instead used stainless bolts the exact same length & thread to avoid the bolt corroding to the roof