The new Mercedes-Benz S-Class is here, and with it a host of new features, bits, and baubles for the discerning luxury executive sedan buyer. It will come in three distinct flavors, starting with the S500, S580, and the plug-in hybrid S580e. It continues the long line of successful cars to wear the Mercedes badge. You already know the S-Class will be comfortable, quiet, powerful, safe, and expensive (although Mercedes hasn't detailed the exact pricing yet). It kicks in, according to Mercedes, at temperatures under 39 degrees Fahrenheit.