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2009 Mercedes S-Class

The 2009 S550 4MATIC Sedan

Even before you step inside, the S550 mesmerizes - from the V-shaped trunk lid, to flared wheel arches and LED side marker lamps, to the iconic hood ornament. And throughout the cabin, its furnishings set an enchanting tone. But it’s under the hood where the S550 truly dazzles. It doesn’t just move down the road, it devours it.

PRE-SAFE

Our predictive occupant-protection system, PRE-SAFE acts automatically to prepare for a possible accident using sensors from two of the vehicle’s active safety systems: Brake Assist and our Electronic Stability Program. If sensors detect vehicle movements that indicate an accident is likely, it takes measures to help secure the cabin. PRE-SAFE can tighten the front seat belts and adjust the front passenger seat for optimum air-bag effectiveness. With the optional Rear-Seat Package, it also adjusts the rear seats and raises the rear headrests from the folded position to help protect vehicle occupants. If sensors detect severe skidding that indicates a rollover is possible, PRE-SAFE closes the windows(1) and sunroof.(2) In vehicles equipped with Drive-Dynamic multicontour front seats, the outboard air chambers of the seat cushions and seatbacks inflate to help laterally support the belted driver and front passenger.

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