2012-2015 Audi A6. 2012-2015 Audi A6 Quattro. 2009-2016 Audi A4. 2009-2017 Audi A4 Quattro. AC Condenser: The condenser is part of the A/C system. It receives the hot, high-pressure gaseous refrigerant from the compressor and cools it to a warm liquid state, although still under high pressure.
