Hello & welcome to the forum. To post on any section of the forum, below the banner of six Citroens, click on 'Forums'. Go down the list to the section you want - say the C5 section. Click it and then you have a choice of Technical, Questions, Styling and Frequent problems. Click the section you require. When the new page opens, over on the right is a box, 'Start new topic'. Put your post on the new page.