Autobahn 4 between Aachen and Duren is quite new, well sighted and 3 lanes. That is where I discovered that the limiter kicks in at an indicated 287 kmh (178 mph). Despite multiple goes, I couldn't get it above that.
The A4 is on the way to the Ring and merits an early morning blast, especially on Sunday when, if I recall, trucks are subject to restrictions. I know we were not allowed to move our Panzers around on Sunday back in the day.