Air extraction vent, checking

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Fig 1: Identifying Air Extraction Vents & Sealing Lips

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Check air guides to both air extraction vents - A - for blockage (left and right).

Sealing lips - B - in air extraction vent - A - must move freely and close automatically.
Clogged air guides or gummed sealing lips could cause windows to mist up.

NOTE:

The illustration shows the air extraction vent for a Saloon with the rear bumper removed. A different type of air extraction vent is installed on the Avant.
One air extraction vent each is installed on left and right for forced air extraction.

Fig 2: Identifying Vent Openings In Luggage Compartment Lining

Courtesy of VOLKSWAGEN UNITED STATES, INC.

To ensure proper functioning of passenger compartment ventilation, the vent openings - C - in the luggage compartment lining are never to be sealed off.