Mercedes-Benz GLK300 Rain Propeller does not spray water

Q: I used to repair cars with Rain Propeller that did not spray water. Generally, as long as there was glass cleaning fluid and the motor worked, I could just use a pin to clear the nozzle. Today, I took over a Mercedes-Benz GLK300. The wipers did not spray water. I could hear the sound of the motor working. The headlights could sometimes spray a small amount of water. I used a pin to clear the nozzle for a long time but it was ineffective. The glass cleaning fluid I added was full. Is there any other way?

A: Analysis shows that the glass cleaning fluid may be added unclean, causing internal blockage in the system. You can remove the left front tire, pry open the front lining of the front fender, and then disassemble the motor and the water spray pipe. Use compressed air to blow through the flocculent blockage in the blocked pipe to restore the vehicle to normal.