Plenum Chamber Water Drain, Cleaning

Procedure 

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-- On vehicles with high-voltage system, switch on the "parking air conditioner" function (deactivate). Refer to the Owner's Manual.

-- Switch off the ignition.

-- Remove the plenum chamber cover -A-. Refer to PLENUM CHAMBER COVER, REMOVING AND INSTALLING .

-- Clean debris (leaves, pine tree needles) and other contamination out of plenum channel -A-.

-- Check the valves -C- of the water drains -B- for proper functioning (valves -C- must not stick or be obstructed by dirt).

Courtesy of AUDI OF AMERICA, LLC

TIP

• To check the water drains -B- that are difficult to reach, use a commercially available and illuminated endoscope, for example. It is best to use a version that has a flexible waterproof head.
• Use a commercially available flexible gripping tool to clean, for example coarse dirt from difficult to reach water drains -B-. Then clean the remaining dirt through the valves -C-.