Hi, in need of some help please. Cant get the tailgate to open with the handle on my 51 C5 estate. I can release it if i crawl in the back and manually do it, but from the outside it just wont budge. Also how do i get the internal cover off the tailgate. I have taken out all of the studs around the edge, but cant seem to find a way to get the two grip handles off. I have tried to lever the black studs but i have just broken one, there must be an easy way to do it?? Cheers