Type 4 prototype information is very hard to come by. Here is the few snippets I found so far. This page shows the 411 Cabriolet prototype manufactured by Karmann in Osnabrück and the 411 notchback prototype, also known as EA 142.

	The VW 411 Cabriolet prototype
	411 Cabriolet: retractable roof
	411 Cabriolet: rear view
	411 Cabriolet: dashboard
	411 Cabriolet: passenger side
	411 Cabriolet: View through the passenger door
	The VW 411 notchback prototype (EA 142)
	EA 142/411 notchback: passenger side
	EA 142/411 notchback: Another passenger-side image
	EA 142/411 notchback: rear view
	EA 142/411 notchback: frontside detail
	EA 142/411 notchback: engine compartment
	EA 142/411 notchback: dashboard