First, it is stunning to me that 2019/20 MB electronic control modules would be less water-resistant than current cellphones. To Bobtuba and others looking to keep humidity low, while stored on shorepower you could run the heat pump at a low setting. Heat pump and dehumidifier are same technology. Without shorepower use a lot of Damp-Rid-type desiccants. I saw on FB thread that one new Unity owner had water in side airbags and mold. Now, that's a horse of a different color. Did LTV have some chassis awaiting up-fitting stored in an unprotected area? I had "chassis-envy," at first, after buying a gently used 2019 on a 2018 chassis. Now, commiserating with owners of the new rigs, but thankful - hopefully - this is one issue I won't have to confront.