The Mercedes-Benz Geländewagen (G-Class to its friends) hit the streets for the very first time on German soil in 1975. Today, the G-Class is still going strong and uses basically the same components it did 40 years ago. An all-purpose car for the rich and sometimes famous, the G550 starts at more than $100,000. Want more power? Go for the G63 AMG and its 536 horsepower. The pinnacle of extravagance is the six-wheel drive version.