A6 Quattro Sedan V8-4.2L (BVJ) (2007)
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Insert the Center Vent Temperature Sensor (G191)- B - on the proper side into A/C unit mount - D -.
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Install the removed components again in reverse order.
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Check the DTC memory for the Climatronic Control Module (J255) A/C control head and erase any faults displayed if necessary.