I recently purchased a one owner 1969 2000TC. It was purchased new in Germany by a serviceman and shipped to the US in the early 70's. The dip switch stalk is not switching from two to four headlights as it should. A quick inspection shows that there should be a detent of some type that would make a connection when the lever is moved up and down. There is nothing there and the lever moves freely. Does anyone have experience repairing this assembly?