The Mercedes S Class is widely referred to as 'The Best Car in the World', and it is with good reason. The S class always incorporates the best and the latest tech from Mercedes, and shows us what all cars will be like a decade later. In this video, we drive and talk about what we think is the best modern S Class - the W221. We are driving the most desirable version of the car to buy used today, the S500 Biturbo.