This summer, Mercedes-Benz introduces the sixth generation of the SL550

The big story with the new SL550 is weight loss. The thermoformed aluminum unibody gives it a curb weight that's 300 pounds lighter than its predecessor.

The interior features a plethora of tech geekery, such as the 600-watt Harmon/Kardon sound system, worthy of the fussiest music snob.

The roadster features a 7-speed automatic transmission.

The SL550 is powered by a twin-turbocharged, 4.7-liter V8 that produces 429 hp.

The car is so well-engineered and built that even at 90 miles per hour, it allows you to speak in a whisper, literally, to a companion in the passenger seat – and be heard.