I just happened to listen to some of the older shows, and this one had some information on driving a car in Europe. I'd just like to comment on a few minor points concerning driving in Germany:
One of your show guests got the colors of the Autobahn signs mixed up. In Germany, they are blue. Not sure where they might be green except for the U.S. freeways.
"The ethic is: Never cruise in the fast lane" - that is certainly true. And if you take into consideration that passing on the right hand side is illegal, this does make a lot of sense. It is in fact quite dangerous to hog the center lane or left lane at a slow speed, and drivers who do that have been known to be pulled over by the police.
I absolutely have to comment on the information that Germans hit the brakes hard the moment they see a speed limit sign: The reason for that is not that we are such obedient, law-abiding people as we are generally reputed to be. The reason is: We know there is a speed trap coming up around the next corner! And getting caught speeding by 80 km/h above the speed limit (your example of 180km/h in a 100 km/h zone) -- you might as well turn in your driver's license right away.