No they just had a look at it!! There is also a fuel smell, which disappears when the car is being driven but obvious when it is idling, i pointed out this to them as well...but as the car is quite old they don't seem particularly interested. Honestly, this car is spotless, body, interior and engine are all in pristine condition....so, I was totally shocked when one garage receptionist even suggested not even repairing the car as it would cost possibly £100 to repair...I couldn't believe it!! I just gave her a really dirty look and left...
But anyway, in reply to your question, 3 mechanics have looked at it, scratched their heads then said they would change the idle control valve. I'm thinking about taking the car to a proper BMW garage, may cost quite a bit more but hopefully i'll get a proper diagnosis!