The phrase describes the process of removing obstructions from the drainage system designed to channel water away from a vehicle’s retractable roof panel. This system typically consists of small tubes or channels located in the corners of the sunroof assembly, directing rainwater or condensation away from the vehicle’s interior. A common example involves using compressed air or a flexible wire to dislodge debris that has accumulated within these channels.
Maintaining clear drainage is crucial for preventing water damage within the vehicle. Blockages can lead to water accumulating around the sunroof, potentially causing leaks into the headliner, seats, and electrical components. Historically, vehicles with sunroofs have been prone to this issue, making regular maintenance of the drainage system a necessary preventative measure against costly repairs. Proper function also prevents musty odors and mold growth associated with trapped moisture.