hi, my car was in the garage last week as some of you may already know, getting a new turbo intake pipe fitted as the old one blew off, (big bang, lots of black smoke!!!) now i noticed today that my 'econ' button/light was on, and i am unable to swith it off. i have had a look on here at some other posts regarding this issue, ie. faulty pressure switches, not been re-gassed properly etc... but i am wondering, is it possible that while it was in the garage there is maybe something in that area they might have done to cause this, as the light wasnt on previous to this!!! OR is it possible that i just need my AC re-charged, and if so, what is a reasonable price to get this done? thanks!