Cabin Ventilation Grille: Service and Repair

Passenger Compartment Forced Air Extraction

• The following is a test for the forced air extraction on an Audi A5 Coupe. On other vehicles such as the Audi A5 Sportback, Audi A4, Audi Q5 etc, the location of the components may differ, but removing and installing the components is identical.

• On the Audi A4 sedan, the passenger compartment is ventilated by an opening between the rear window - B - and the rear shelf - A - (in the body) into the luggage compartment. The air is guided through the ventilation openings - C - in the space between the body and the luggage compartment trim - D -.






• On the Audi A4 Avant and the Audi Q5 the air is routed on the left and right sides through the vents in the side trim - A - and in the back of the luggage compartment. From there the air flows to the ventilation frame - B -.






• On the roof is closed on the Audi A5 Cabrio, for example, over the openings near the rear shelf - A - (behind the head restraints - B -), the air is guided through the safety belt guides - C - and through the roof trim - D -.






• The passenger compartment on the Audi A5 Cabrio is ventilated the same way as on the other vehicles when the roof is closed. There are ventilation slots - C - in the luggage compartment trim panel - B -, which guide the air to the ventilation frame for forced air extraction - A -.






• One vent frame - A - is installed in the body vent opening - C - on the left and the right for the forced air extraction.






• Forced air extraction vent frames - A - are removed and installing from the outside (with the bumper cover removed).

• There are different versions of the vent frame for the forced air extraction - A - on vehicles with and without noise insulation - D -. Installing the noise insulation - D - depends on the version of the vehicle. Refer to the Parts Catalog.






• It may be necessary to remove the auxiliary battery (A1) in order to access the left noise insulation on vehicles with a high voltage system (hybrid vehicles) - D -.

Checking the ventilation openings in the luggage compartment trim panel

- Check the ventilation passage in the luggage compartment trim panel on both the left and right side - C - and in the rear luggage compartment trim pane (left and right) - A - to make sure they are not blocked.

• To ensure proper passenger compartment ventilation, the left and right ventilation frames - C - in the luggage compartment trim panel must not be blocked.

• Obstructed ventilation frames in the luggage compartment trim panels - C - or obstructed vents in the ventilation frames - A - can cause the windows to fog up.

• The illustration shows the luggage compartment on an Audi A5 Coupe. On the Audi A5 Sportback, the Audi A4, the Audi Q5 etc, the location of the components may differ.

Check forced air extraction vent frames from inside

- Remove luggage compartment trim panel (left and right)..

- Make sure the left and right ventilation frames - A - are not obstructed.

• Sealing lips - B - in vent frames - A - must move freely and close by themselves, stuck sealing lips - B - can cause windows to fog.

• On vehicles equipped with noise insulation - D -, make sure the air vent under the noise insulation - arrow - leading to the ventilation frame - A - is not obstructed by objects.

• Closed or plugged air ducts to the vent frames - A - can cause windows to fog.

• To ensure sealing lips - B - close correctly, vent frame - A - must be installed on the correct side.

Forced air extraction vent frames, checking from outside, removing and installing:

- Remove the rear bumper cover.

- Make sure the left and right ventilation frames - A - are not obstructed and that the sealing lips - B - function properly.






• Stuck sealing lips - B - can cause windows to fog.

• The ventilation frames - A - can only be installed in one position to ensure the sealing lips - B - close correctly.

• In this illustration, ventilation frame - A - is depicted with rear bumper cover removed.

• When installing, vent frame - A - should be pressed into opening on the rear lid end piece until all retaining tabs engage securely.