It may be labeled a 2007 model, but the redesigned Mercedes-Benz S-Class will start showing up at your dealer during the first part of 2006. Available with either S500 or S600 badges, the 2007 S-Class will be powered by your choice of a 382-horsepower V8 or a V12 with an estimated 500 horsepower. Included technology ranges from a seven-speed automatic transmission to a Pre-Safe collision preparation system. Just before an impact, Pre-Safe tightens the seatbelts, closes the sunroof, and automatically adjusts the seats to their optimum positions. For 2007 the system has been improved; it now closes all of the side windows and the seat cushions inflate to keep occupants tight in their seats.