The new Mercedes-Benz S 500 PLUG-IN HYBRID blends an ultramodern hybrid drive with unique innovations and luxurious equipment and appointments of the S-Class. The first certified three-litre luxury saloon in the world, the Mercedes S 500 PLUG-IN HYBRID, will be delivered to customers this month, according to Mercedes-Benz. Mercedes-Benz S 500 PLUG-IN HYBRID. | Credit: Mercedes…