Ruifeng s2, with the thermometer and tachometer in the car, is not helpful in the fixed direction. What happened?

It wears out after a long time. As soon as the car starts, the gears of the water thermometer and tachometer are turning, and they will wear out after a long time. The gears inside and outside the watch are plastic, and the quality is poor. Ruifeng S2 is the fourth product of JAC in SUV market, positioned as Yan value SUV, and the product design comes from JAC Design Center in Turin, Italy.