When it reaches near parity with US prices. European industry was powered by heap Russian natural gas, especially german. If the European price of natural gas is a multiplier of US prices then European manufacturers will have to raise prices dramatically and their exports will shrink dramatically. No Mercedes Benzes for Americans if this goes on.
When was that?
Mercedes Benz has a plant in Alabama. They’ll just expand it if there are sales to be had and producing in Germany is too expensive.