I don't agree. From Cologne you can stay on the Autobahn/Schnellstraße pretty much until you reach the Grohmann front-door. I think that's a much better kind of commute for reading/sleeping than going through urban traffic.
Couldn't read our sleep while being driven on the B51 ( from experience). But not everyone will be as prone to being car sick as I am. Didn't Audi once develop suspensions that cancel the effect of curvy roads?