Audi A4 Owners & Service Manuals

Audi A4: Laws and Regulations

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 General Information

  Note The laws and regulations listed below are applicable in Germany. Different or additional laws and regulations may apply in other countries. The effects of climate change can be seen wor

 Laws and Regulations

Refrigerant Circuit, Converting R12 to R134a and Servicing   Note For environmental reasons and on account of the corresponding legislation, refrigerant R12 can no longer be manufactured or

 Refrigerant Circuit

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 Hydraulic Pressure Sensor 1 -G545- and Hydraulic Pressure Sensor 2 -G546-, Removing and Installing

  Note The Mechatronic remains installed.   WARNING The system is under pressure. The electronic ATF pump must be deactivated every time before opening the transmission, and the hydraulic pressure reservoir is drained. Refer to → Chapter "ATF Pump, Deactivating and Draining

 A/C System, Operating after Charging

  Note If the mechanically driven Air Conditioning (A/C) compressor was removed, rotate it approximately 10 times by hand before using it for the first time (during or after installing, for example before installing the belt) to prevent damage caused by liquid impact when first switched

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