Hi, We sold this motorhome quite a while ago. I can tell you the metal lever 1:39 in the center of the bed is the release lever. It pushes forward to release the bed. The mechanism may be a bit stiff on your model and could probably do with some lubricant once you get it down. If it won't come undone, try getting someone to lift the weight of the bed while you operate the lever.
@@davemurden3432 brilliant thank you, we shall give it a try, it did come down when they company we brought it from showed us around, think we might just be being a bit thick lol 😆