Plenum Chamber Water Drain, Cleaning

WARNING: This page is about a different car, the 2021 Audi S4 and 2021 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Procedure

-- Switch off the ignition.

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

Courtesy of AUDI OF AMERICA, LLC

-- Clean the plenum chamber of debris (leaves, pine tree needles) and other objects.

To check difficult to access water drains -D- (with the opening -E-) use for example an illuminated endoscope. It is best to use a version that has a flexible waterproof head.
To clean difficult to access water drains -D- (and the opening -E- to the water drain) loosen and remove coarse dirt with for example a commercially available flexible gripping tool. Then wash out any remaining dirt through the water drains -D-.
Both water drains -D- are currently without valves, the water flows via the openings -E- in the area of the rear, right, and the left front wheel housing liner.