The reason why the Mercedes-Benz clk reports that the outdoor temperature sensor is short-circuited to ground is due to a wiring problem. Mercedes-Benz is a world-famous luxury car brand. Net profit in 2021 is 23.4 billion euros. In January 1886, Carl Benz invented the world's first three-wheeled automobile and obtained a patent (Patent No.: DRP37435). He is known as the inventor of the automobile.