Audi A4: Refrigerant Circuit, Flushing with Compressed Air and Nitrogen
Audi A4 (B9) 2016-2025 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
SEE MORE:
Checking Pressures on Vehicles with Expansion Valve and Receiver/Dryer (with
Internally Regulated Compressor)
General Information
Note
Connect the A/C service station. Refer to
→ Chapter "A/C Service Station, Connecting".
Observe the test requirements. Refer to
→ Chapter "Pressures, Checking".
- With the ignition switched off, check the pressure in the
refrigerant circuit (u
Connection for External Multimedia Devices
Overview - Connection for External Multimedia Devices
There are several External Audio Source Connection -R199-
versions:
USB Charging - AUX IN, UE4
AMI (Audi music interface) - USB connection (quantity 2) -
AUX IN/ASI, UI2/UE7
"USB charge" and
"USB connection" are in the USB
Connection Basep
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