How does the Kettenkrad steer?

Like a motorcycle with sidecar: With the handlebar! (A normal motorcycle is not steered with the handlebar, it is steered by weight transfer of the rider!)

If you turn the handlebar a little bit, it turns only the front fork with the front wheel. If you turn the handlebar more, it engages the steering brakes of the tracks.

Click here to see a drawing of the steering system.