What is the reason for the vibration of Mercedes-Benz air conditioner?

What is the reason for the vibration of Mercedes-Benz air conditioner? What is the reason for the vibration of Mercedes-Benz air conditioner? There may be several reasons why Mercedes-Benz vibrates as soon as the air conditioner is turned on: 1. Dirty air-conditioning filter: Dirty air-conditioning filter causes excessive noise and abnormal sound. 2. There are sundries in the fan blades of the blower: there are sundries in the fan blades of the blower that cause abnormal sound. You can start the blower directly without starting the car to see if there is any sound. If the sound appears, it can be determined that it is the blower. 3. Fan problem: the fan blades of the automobile air conditioner are deformed and the fan motor is damaged. 4. Wear of clutch bearing: Wear of clutch bearing in air conditioning pump causes the engine sound to become louder after the air conditioner is turned on. This component has not been replaced separately, and the air conditioning pump assembly needs to be replaced. @20 19