Long considered the benchmark for full-size luxury cars, this version of the Mercedes-Benz S-Class solidly lives up to the model's reputation. This 2014 redesign offers a host of advanced technologies, while upping the luxury ante on many levels. The comprehensive suite of active safety features employs a battery of radar sensors and cameras. Features include active cruise control, lane-keep assist, forward-collision warnings and mitigation, along with attention assist ' to determine when the driver is drowsy. There is even an optional fragrance dispenser, which operates automatically at pre-determined intervals to keep the interior of the car smelling nice.