In Germany, on the autobahn, people drive on the right side (same as America), and stay out of the left lane, except to pass or haul ass.
If you're in the left lane and a BMW comes up behind you, he'll flash his headlights, signaling you to get the hell out of the way. Do so, and let him haul ass. For fun, try to catch him! You'll never forget it!
And, if you're boogying in the fast lane, folks will let YOU pass.
German drivers are SO much more polite than us American drivers. Present company excepted, of course.
And to exit the autobahn, slow down and look for the AUSFAHRT sign. I kid you not.
Happy Motoring!