How is a true luxury car defined?

Maybach Exelero Creative Commons/Flickr/Simon Davison

From Bentleys to Lincolns and more, the guys have explored all sorts of luxurious rides -- but how do we actually define the term "luxury car"? Is it cutting edge technology? A smooth ride? A high price tag?

Topics in this Podcast: howstuffworks, ben bowlin, Scott C. Benjamin, Rolls Royce, luxury car, Bentley, lincoln, Cadillac, Expensive Cars, Maybach