The new Xuan Yi after two or three months, the central control behind the wiper that position, the left and right sides are different, especially slightly uneven on the road will always ring, go to the 4s shop to check, the staff said that it may be the sound of ingredient friction, let me warm up and come again, said that the big winter disassembly is easy to disassemble parts. But now I am driving every day as long as I hear that noise is very irritable, what to do