Mercedes unveils 20-foot-long convertible concept car

German automobile maker Mercedes on Saturday unveiled 20-foot-long Mercedes-Maybach Vision 6 Cabriolet concept car. The electric car is the first full-sized, open top Maybach with a drive system that has an output of 750 horsepower. The car offers a range of 500 kilometres on a single charge, and is claimed to run 96.6 kilometres with just five minutes of charging.