Hi My A3 is 3 years old now and the aircon started going smelly so I decided to get it re-gassed and have an aircon service. Anyway, to cut a long story short, the "ECON" button sometimes will jump on automatically and stay on. I tried pressing it again to turn it off but it just stays on, the only way to turn it off is to turn off the engine and restart. It's an intermittant problem though as it doesn't jump on all the time and it is starting to drive me nuts ! Anyone have any ideas as to why ? ps. Aircon even on 18c sucks !