Always a bad sign when people vote against unionization of their workforce. With the benefits of having a union(better pay, pension plan) you will be better off than what you will be getting at the rate you are working. Hope unions will continue campaigning in the deep red South, because to revitalize labor in the US we need to target the right to work states run by enemies of the worker. You can't have worker solidarity in one region without having the backing of the rest of the nation.
Maybe it's a sign that companies have learned to treat their employees so well that a majority of employees do not look on management as enemies and they don't need a union to be respected.
Or maybe, Mercedez Benz is more comfortable dealing with European Unions vs. US Unions.
As I said already, European Unions are FAR more cooperative. They have far less things to hassle about.
And they practice sectorial barganing which covers entire industries rather than the enterprise System in the US.