Audi A4 Owners & Service Manuals

Audi A4: Refrigerant Circuit, Flushing with Compressed Air and Nitrogen

Audi A4 (B9) 2016-2023 Service Manual / Heating, Ventilation & Air Conditioning / Refrigerant Circuit / Refrigerant Circuit, Flushing with Compressed Air and Nitrogen

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 General Information

Vehicles with a High Voltage System (Hybrid Vehicles) Extremely Dangerous Due to High-Voltage The high-voltage system is under high-voltage. Death or serious bodily injury by electric shock. - I

 Refrigerant Circuit, Flushing

  Note In the case of vehicles on which the refrigerant lines have no threads for connection of Adapter Set -1785-. Use for example a flushing gun with rubber end piece or an adapter from th

 Refrigerant Circuit, Cleaning (Flushing), with Refrigerant R134a

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 Exterior lighting

Switching the lights on and off Fig. 42 Instrument panel: light switch with button Light switch Turn the light switch (1) to the corresponding position when the ignition is switched on. The symbol and the selected position will turn on (except position 0). O - The daytime running lights* will

 Audi pre sense basic

Applies to: vehicles with Audi pre sense basic Audi pre sense basic is automatically active at speeds of approximately 20 mph (30 km/h) and higher. Audi pre sense basic can trigger preemptive safety measures during emergency braking and dangerous braking maneuvers as well as in unstable driving situ

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