The vents pull air from outside the windshield near the wiper on the passenger side. There is a filter behind the glove box near the fan to filter the outside air. This is likely the largest cavity in the HVAC system of the car so it might be where a snake would go. I recently saw a video online of...

Wondering where do the vents on the dashboard lead to? The defrosters in the center up under the windshield? How would one go about getting a snake out of those vents?