Cabin Ventilation Duct: Testing and Inspection

Passenger Compartment Forced Air Extraction, Checking

• For forced air extraction, one ventilation frame - A - each is installed on left and right.






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

• On the Audi TT Roadster, the ventilation openings - B - in the rear lid trim - A - must not be covered by any objects when the rear lid is closed.






Checking the ventilation openings in the luggage compartment trim panel

- Check air duct through left and right luggage compartment trim ventilation openings - A - to both vent frames - B - in luggage compartment (left and right) for throughput.






• To ensure proper function of passenger compartment ventilation, vent openings - A - in luggage compartment trim on left and right must not be sealed.

• Closed ventilation slits in luggage compartment trim - A - or plugged air ducts to vent frames - B - can cause windows to fog.

• This illustration shows the luggage compartment in an Audi TT Coupe. On the Audi TT Roadster, air is guided out of the passenger compartment to the ventilation openings - A -, through the convertible top compartment and via the vent slits that are installed in the upper left and right luggage compartment trim.

Check forced air extraction vent frames from inside

- Remove luggage compartment trim (left and right).

- Check left and right vent frames - A - for throughput.






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

• 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 rear bumper cover.

- Check left and right vent frames - A - for throughput and sealing lips - B - for function.






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

• In order for sealing lips - B - to close properly, vent frame - A - can only be installed in one position (smaller radius - arrow - is at top).

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






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