What Causes Water Leakage in the A-Pillar of a Mercedes-Benz GLK?

[Matilda]

Water leakage in the A-pillar of a car is usually caused by poor sealing of the window rubber strips or the fixing holes of the roof rack. Solution for water leakage: Find a stiff plastic strip and insert it into the drainage hole, moving it up and down a few times. This should generally clear the drainage pipe. If water still accumulates after this step, it indicates that the drainage pipe is also blocked. In this case, you can take the car to a repair shop and ask a technician to use a tire repair air gun to blow air into the drainage hole, which often helps clear the blockage. Post-clearance inspection method: Pour a bottle of mineral water into the sunroof and check if water flows out from the drainage outlet under the car. If water flows out, it means the drainage pipe needs to be cleared.