When Stewie is getting on the plane while Brian sees him from the airport window he puts his arms up and makes 2 'v's with his hands which is the same pose Richard Nixon did when he was getting on a plane after resigning from the Presidency.
The words the German guide yells loosely translates to "You will sit down! You will be quiet! You will not insult Germany!"
The title is based on the series of "Road" films that starred Bing Crosby, Bob Hope and Dorothy Lamour.
Second episode in the "Road to..." series but the first to take place outside the United States.
On the bus, the German tour guide says that Munich was the home of many important people such as Thomas Mann. Mann lived in Munich for a period, but he was not born there. He was born in Lübeck in 1875.