the gecko logo on the car represents Audi's Quattro four-wheel drive system and is the registered trademark of Audi's four-wheel drive technology under Volkswagen. Because the gecko has a strong climbing ability, which is very suitable for the good handling and passing performance of the system, Audi directly uses the gecko as the LOGO of the Quattro system. Audi is a German luxury car brand with four interlocking rings. Now it is a subsidiary of Volkswagen, headquartered in Ingolstadt, Germany, and has branches in many countries such as China. Audi's main models are A1, A3, A4, A5, A6, TT, R8 and S and RS performance series.