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– Check left and right vent frames -A- for throughput.
Note
♦
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, remov‐
ing and installing
– Remove rear bumper cover. Refer to⇒ Body Exterior; Rep.
Gr. 63 ; Removal and Installation .
– Check left and right vent frames -A- for throughput and sealing
lips -B- for function.
Note
♦
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 open‐
ing on the rear lid end piece until all retaining tabs engage
securely.
Audi TT 2007 ➤
Heating, Ventilation and Air Conditioning - Edition 01.2011
4. Diagnosis and Testing 99
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