Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2005A4 QUATTRO, 4D SEDAN, 3.2 GREPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)GENERAL SERVICINGREFRIGERANT R134A - SERVICING87 - AIR CONDITIONINGREFRIGERANT CIRCUITREFRIGERANT CIRCUIT, DETERMINING LEAKSLEAK DETECTION ADDITIVE, ADDING WITH REFRIGERANT CIRCUIT CHARGED
2005 Audi A4 Quattro, 4D Sedan, 3.2 G
Leak Detection Additive, Adding with Refrigerant Circuit Charged
2005 Audi A4 Quattro, 4D Sedan, 3.2 GSECTION Leak Detection Additive, Adding with Refrigerant Circuit Charged
NOTE:
- Pay attention to the following if leak detection fluid has already been poured into a refrigerant circuit in the course of previous repair work: Only add new leak detection fluid if refrigerant oil is replaced. If only some of the refrigerant oil has been replaced, just add the corresponding quantity of leak detection fluid. If, for example, 100 ml of refrigerant oil has been replaced on a vehicle containing 250 ml, only add 1 ml (cm 3 ) of leak detection additive.
- A small quantity of leak detection additive remains in the service connection. This is to be carefully removed so as to avoid subsequent erroneous leak detection.
- The air conditioner must be operated for at least 60 min. to distribute the additive throughout the refrigerant circuit (compressor must run). Depending on the magnitude and location, it may take several days for sufficient refrigerant oil and additive to emerge to clearly identify the leak.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.