There is hardly a building project that German politicians and the authorities support as benevolently as Tesla's electric car factory in Grünheide.

Numerous politicians, from Federal Economics Minister Peter Altmaier (CDU) to Brandenburg Prime Minister Dietmar Woidke (SPD), boast of their good contacts with Elon Musk.

People like to adorn themselves with their relationships with the Tesla boss.

Up to one billion euros flows from several funding pots.

But the US group of all people is now on a course of confrontation with German politicians. Despite the subsidies and preferred approval procedures, Tesla supports a lawsuit against the German government that Deutsche Umwelthilfe (DUH) filed in early March. Ironically, the DUH, which has enjoyed a dubious reputation since the dispute over diesel driving bans.