Because only Audi has such technology for all-aluminum body, the shell of Mercedes-Benz c3 3. in 212 is made of iron.
Mercedes-Benz is a world-famous luxury car brand. In January 1886, karl benz invented the world's first three-wheeled car, and obtained a patent (patent number: DRP 37435), which was known as "the inventor of the car". At the same time, gottlieb daimler, another founder of Mercedes-Benz, invented the world's first four-wheel car.