I have just bought a beautiful 2006 Jazz, my first 4 wheel Honda, but have noticed what appears to be serious corrosion beside the tailgate lock barrel. There is a protective decal round the lock, which does a very good job of disguising it. To make a repair I will have to remove the barrel. My question is how do I remove it? I realise that there is only wiring attached to the rear but don't know how to release the barrel from the bodywork. Thanks.