A4 Quattro Sedan L4-2.0L Turbo (CAEB) (2009)
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Press clip - 2 - outward at - arrows -, for example, with a small screwdriver.
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Remove clips - 2 - from mirror base - 1 -.
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Remove the rain/light recognition sensor (G397 ) - 3 - from the mirror base.
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A sensor foil remains affixed to the windshield.
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If the same windshield is being re-installed, remove the sensor foil from the glass including any remaining adhesive.
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Clean the surface with cleaning solution D 009 401 04.
Install the rain/light recognition sensor (G397)
CAUTION!
If the same rain/light recognition sensor (G397 ) is being re-installed, then the sensor foil must be replaced.
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If necessary, also remove the sensor foil from the rain/light recognition foil (G397).
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Carefully pull the sensor foil - 2 - from the rain/light recognition sensor (G397)- 1 -.
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Clean the surface with cleaning solution D 009 401 04.
CAUTION!
Sensor surface must be completely free of foil remnants.
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Peel silicon paper - 3 - from sensor foil - 2 -.