Audi A4 Owners & Service Manuals

Audi A4: Refrigerant Circuit

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 A/C System Repair Information

Air conditioning systems designed for refrigerant R12 are only to be filled with refrigerant R134a if certain requirements are fulfilled. Refer to → Chapter "Refrigerant Circuit, Convertin

 Using Service Station

 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

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 Leaking or Damaged Components except A/C Compressor, Reservoir or Receiver/Dryer

The refrigerant circuit was completely empty (for example with larger leak or cracked hose)   Note In the event of only a minor leak with slow escape of refrigerant (e.g. at a small leakage point), the amount of refrigerant oil lost and the amount of moisture penetrating is not sufficien

 Start/Stop system

Description Applies to: vehicles with Start/Stop system The Start/Stop system can help increase fuel economy and reduce CO2 emissions. In Start/Stop mode, the engine shuts off automatically when stopped, for example at a traffic light. If certain conditions are met, the engine may stop before the

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