A6 Sedan V6-3.2L (BKH) (2007)
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Remove screw plug from bleeder valve - B -.
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Connect hose section - D - (as extension) to coolant hose - A -.
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Seal coolant hose - B - (e.g. with plug - E - ).
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Place vessel - C - beneath extension hose - D -.
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Use compressed-air gun (with rubber mouthpiece) - F - to carefully blow coolant by way of open connection for bleeder valve - G - out of
"drivers" heater core (into vessel - C - ).
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Remove plug - E - from coolant hose - B - and insert it in coolant hose - A -.
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Connect hose section - D - (as extension) to coolant hose - B -.
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Use compressed-air gun (with rubber mouthpiece) - F - to carefully blow coolant by way of open connection for bleeder valve - G - out of "front
passengers" heater core (into vessel - C - ).
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Remove glove compartment and lower instrument panel trim (on drivers side).
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Depending on vehicle equipment, remove electrical control modules and possibly corresponding holders impeding heater core removal (e.g. Front
Information Display Control Head Control Module J523 and corresponding holder).
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Remove center console side trim on right and left
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On right side, remove holder - A - for glove compartment.
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Screw out bolts - C -.
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Remove air duct to footwell vent - B - for front passengers side.
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On left side, remove holder - A - for trim beneath instrument panel.
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Screw out bolts - C -.
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Remove air duct to footwell vent - B - for drivers side.
NOTE:
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Depending on vehicle equipment and positional tolerance between Heating and A/C unit and bracket for pedal cluster, removal of footwell