What is the reason for the malfunction of the Mercedes-Benz C-class co-pilot window?

[VanIvan]

Reasons for the malfunction of the co-pilot window lift: circuit failure; deformation or damage of the glass mud slot; loose screws of the lift; damage to the window lift; deviation in the installation position of the guide rail. The recovery methods are introduced as follows: Recovery methods: You can try disconnecting the power supply and reconnecting it to see if it recovers. In addition, you can also inspect the circuit; clean or replace the glass; replace the window lift. Precautions: To prevent rainwater from flowing in, there is a rubber strip on the interior window frame. After the glass is soiled, the friction with the rubber strip increases, and the switch will also be affected, so the glass needs to be kept clean frequently. Small cards are often inserted into the window gaps. If not handled properly, the cards may fall into the door along the window. The internal structure of the door is complex, and the falling of the cards into the door can cause a series of chain reactions, such as damage to the window lift, door malfunction, and blockage of the drainage port.