Clogged drains can allow rainwater to accumulate in the plenum tray (at the base of the windshield). The water may leak into the vehicle's interior, brake booster, or electrical components, which can lead to major problems. Our technicians recommend keeping the tray clear of leaves, pine needles, and other debris.
Various Probelms Caused by Clogged Plenum Tray Drain on Audi A6 Quattro
Average mileage: 136,555 (110,000–177,000)
13 people reported this problem
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Had this problem when the car was relatively new. Leaves clogged the drainage holes. Cleared the holes, but not until water had seeped into the interior.