Germany was already the world's second largest exporter in 1960. With the DM.
This is not sustainable.
Germany exports more than it imports, at least since the 60s.
> But recently this had led to the absurd situation, that Germany exports both, goods AND capital
Not recently. Happened already in the 70s and 80s. The decade after reunification was unusual. Starting with 2001 Germany was back exporting capital.