It has been a looooooooooooong winter and spring here in Wisconsin. However, it is nice here now, the RV is out of the shed and out of the shop and back on the road. After dealing with the dead gauge issue over the winter and countless hours, (along with Freightliner tech support), we bit the bullet and took it to the Freightliner service center near us. After 5 hours of labor, the problem turned out to be a broken wire somewhere between the Vehicl Data Computer by the engine and the Message center located in the dash.
Now good as new!! Back on the road this summer!!