I have 2012 5er made by keystone its a alpine. I had the same problem with the bedroom silder. Mine would come out about 1lnch at the bottom. First time dealer changed out the hyd pump, they said they fix it. Ipick up the trailer and as I drove home the slide came out. The dealer then change the manifold still didnt help. It took 3 pump and a manifold to get right. The dealer towed the trailer 30 miles and the slide never came out. I then came down and pick up the trailer and took it home about 65miles. I havent taken the trailer out yet. Good luck, it took 3 hyd pumps to get it right for now.