S6 V8-4.2L (BBD) (2004)
Liquid Vapor Separator: Service and Repair
Fuel Filler Neck With Expansion Tank, Removing And Installing - Vehicles With 8-cylinder Engine Except A6 Allroad
Removing
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For removing the filler neck with expansion tank, the fuel tank should not be over 1/2 full. If necessary, empty fuel tank.
CAUTION: After reconnecting vehicle battery on vehicles equipped with Audi Telematics by OnStar(R), switch-on the emergency (back-up) battery
for the Telematic/Telephone Control Module.
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Vehicles with coded radio/navigation system (RNS) coding, refer to Owner's Manual if necessary.
Audi A6:
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Remove cover above battery -arrow-.
NOTE: On vehicles without battery cover: Remove plenum cover
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With ignition switched off disconnect battery Ground strap -arrow-.
WARNING: Fire Hazard. Do not smoke, work near heaters or have anything in the area that could ignite the fuel or fumes.
Audi RS6: