Elite full-size Mercedes sedans continue with four editions -- S430, S500, S600 and (arriving late) S55 AMG -- but with a facelift that adds new front fascia, redesigned headlamps and taillight glass plus interior updates. In addition, there are new 4Matic AWD versions for S430 and S500. Powertrain enhancements also come from a new bi-turbo V12 for S600 at 469 hp and a supercharged V8 in S55 AMG ripped to 493 hp. The performance-geared AMG model also has new redundant SpeedShift buttons mounted on the steering wheel, plus a racing-derived brake system and redesigned cockpit. S430 stocks the 4.0-liter Mercedes V8 at 275 hp, but S500 goes further with the single-cam 5.0-liter V8 cranked to 302 hp. With fitted seats and touches of polished hardwoods and fine leather decorating the cabin, these stretched sedans envelop passengers in a staggering array of sophisticated controls and perks to make life in the fast lane not only comfortable but secure. Also, there are so many mechanical systems working latently for protection, including devices that stabilize forward movement and tire traction, smart brakes and adjustable suspensions, plus as many as eight air bags lurking to cushion fragile human cargo.
