Hello I have question on my Audi A6 2005 4.2V8 so it’s be...

Hello, my name is \*\*\*\*\* \*\*\*\*\* thank you for using just answer. The site will prompt a phone call, but that is not always necessary. If it is necessary later in the conversation, I will propose it. I am sorry you are having this concern, but I will do my best to assist you. The proper amount of refrigerant is always the starting point of a/c diagnosis, which can only be done with a machine. Next is a/c compressor operation, which can only be checked with a/c gauges. Knowledge of a/c operation is best for this type of issue, but my repair info states that the most common failure of the system is the a/c compressor. Hope this helps, thank you. Kyle S. A.S.E. certified master auto technician, All makes, All models licensed smog technician, test and repair, L-1 advanced engine performance certified Certified Volkswagen technician, 2003,2004,2013,2014,2015 Volkswagen and Audi independent 12 years