A4 Quattro Wagon L4-2.0L Turbo (CAEB) (2009)
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Remove any dirt or coolant which has leaked out of the A/C unit (for example, after removing a leaking heat exchanger).
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Check both connections - A - and - B - on the heat exchanger - C - for damage and dirt.
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Grease both connections - A - and - B - on the heat exchanger - C - with silicone grease.
‹› The silicone grease part number is G 000 405 A2.
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Lightly moisten the seals - D - (contained in the heat exchanger delivery) with coolant (or lightly with silicone grease).