Audi A4: Refrigerant Circuit
Audi A4 (B9) 2016-2026 Service Manual / Heating, Ventilation & Air Conditioning / Refrigerant Circuit
- A/C System Repair Information
- Using Service Station
- Refrigerant Circuit, Flushing with Compressed Air and Nitrogen
- Refrigerant Circuit, Cleaning (Flushing), with Refrigerant R134a
- Refrigerant Circuit, Determining Leaks
READ NEXT:
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
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
SEE MORE:
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
Unlocking and locking the vehicle
Fig. 27 Door handle: sensor for locking
Depending on the vehicle equipment, you may
have various options for unlocking and locking
your vehicle. The settings in the MMI specify
which doors will unlock.
Unlocking or locking using the vehicle key
buttons
To unlock the vehicle, press the
button, f
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