Around 20 years ago, a guy of my former neighbourhood was going fast with his VW Polo G 40 on the Autobahn, suddenly he got a shock, when he saw in the back mirror a VW T1-split-screen-Bus from the early 60ies are coming very fast very close, and then he was using its flash-lights to make the lane free for him.
Totally surprised he let overtake the old VW Bus. It passed him with around 200 km/h (ca.120 mph). On the back it had a kind of "badge": it was written with a brush " Porsche engine! "