We have had our Coachmen for just over a month now and even though we have "camped" in the RV garage to test things out, we went to a local campground this week to test it out more before winterizing it.
When we got parked at the campground and hit the auto level button, everything was going fine and then a loud bang with the MH dropping down in the front. I crawled under and found that the front passenger leveling jack had broken loose from the frame and was pushed way up out of position. After further examination I could see that the U mount that the leveling jack is bolted to had only been tack welded to the frame in 2 spots and had never been fully welded. Apparently parking it in the garage (on level concrete) never put enough stress on the system to cause the failure.
So, I was able to use 2x12 blocks to get the MH level enough to camp in for the week and it will be off to the dealer next week. I guess I will need to spend some time under the coach checking other stuff to see if anything else has been missed.