Strong, worthy. According to Pacific Auto Network, the door of Audi A6 is made of aluminum alloy, which is lighter than the traditional steel door. Aluminum alloy doors have excellent corrosion resistance, wear resistance and strength, which can effectively reduce the vehicle weight and improve vehicle handling and fuel economy. The aluminum door of Audi A6 is solid and reliable under daily use conditions, and it can provide better fuel economy because of the lightweight characteristics of aluminum alloy, so it is worth buying.