... Audi A5 Forum & Audi S5 Forum. I changed the cabin air … If your A5 Quattro smells bad when you turn on the heater or air conditioner, or it seems like the fan doesn't blow air as well as it used to, replacing your cabin air filter is a likely the best fix! If you're getting that musty smell, it's usually caused by bacteria in the aircon system. Here are the most common reasons that you may be smelling a burning smell … Bought 2012 A5 used and unfortunately have been dealing with a somewhat sour smell coming from vents. After these last fee hot days with A/C on, a unbearable smell like pee comes came through. It will kill the bacteria in the system and give a nice fresh smell. I've done some research on it and its caused from the condensation build up from turning your car off while the AC is still running. 2009-2012 Audi … The video above shows you where the cabin air filter in your 2010 A5 … … Anyone have problems with bad/ sour smell coming from air conditioner vents? Typically, the smell is caused by some type of fluid (oil, trans fluid, etc..) hitting the exhaust or other hot parts of the engine. A5oc Forum is an international Audi A5 … Get yourself an aircon cleaner (sometimes referred to as an aircon bomb) - it's a small aerosol which you leave running in the car with the air con on full blast until the tin runs out. I have a problem with my air conditioning on my A5. Unpleasant "musty" odor from Heating and Ventilation system. Recently regassed the system as it was a little low, and after that it was working perfectly. The affected models are listed below. This is definately a common problem on a BUNCH of Audi models. I have a musty smell in my air conditioning system when I first start the car. While there are a variety of reasons your Audi A5 Quattro air conditioning won't work, the most common 3 are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning … Of this recall, the NHTSA officially stated, "The filter housing of the fuel pump (part of the fuel cap flange) may develop fine cracks/fissures resulting in a fuel leak or fuel smell." Ice cold, circulating properly, compressor … In 2015 Audi became the first premium manufacturer to use this technology in a production … It happens both when asking for hot or cold air( ac off & on ) . In the Audi Q7 e-tron quattro a heat pump with an electric compressor is responsible for heating and cooling. The last few weeks a rotten eggs , foul smell has been coming into the cabin from the heater vents. It was fine before and it happens form … Burning Smell Causes: Audi A5. If your Audi A5 has a burning smell, there are a few different reasons that this can happen. 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