Help! Since i bought my audi a3 2.0 tdi 56 reg, ive had the econ button stuck on and whatever i do it wont turnoff. I have just bought a vagcom system and dont have much knowledge of how to use it. I have auto scanned the system and no fault codes occur under the air con system. I have measured the high pressure sensor and it reads 4.5% i have measured the refrigerant pressure and it reads 1bar Im guessing the ac system needs re pressurizing Any help would be greatly appreciated Cheers!