A6 Sedan V6-2.8L (AHA) (1998)
Housing Assembly HVAC: Service and Repair
Complete Air Conditioner Unit, Removing and Installing
Complete Air Conditioner Unit, Removing And Installing
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Discharge refrigerant circuit. See: Service and Repair
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Remove dust and pollen filter and its bracket. See: Cabin Air Filter/Service and Repair
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Disconnect battery cables and remove battery.
Caution
On vehicles equipped with Audi Telematics by OnStar, switch-off the emergency (backup) battery for the Telematic/Telephone
Control Module prior to disconnecting the vehicle battery. Switch-on the emergency (back-up) battery after reconnecting the
vehicle battery
NOTE:
Obtain radio code before disconnecting battery.
On vehicles with power seats, move the seats back as far as possible before disconnecting the battery.
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Release pressure in coolant system by opening cap on coolant expansion tank.
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Clamp off and disconnect both coolant hoses leading to heater core in air conditioner unit (e.g. using VAG 3094)
NOTE:
The coolant hoses must be re-installed in the correct positions:
Coolant hose -A- supply from cylinder head.
Coolant hose -B- return to water pump.
Bleed cooling circuit See: Engine, Cooling and Exhaust/Cooling System/Service and Repair