I don't want to point out the elephant in the room here. I do like the idea of the Italian Tune Up. I too have had the light go off of its own accord after it coming on in the Coupe.
My worry is that if there is an engine fault then taking it out for a blat may have an adverse effect. The fault may turn lethal for an engine part or worse in the event of a failure. In general doctors like to investigate before they cut.
Thats why it is best to have your own OBD 2 reader. At least you can tell what sensor is playing up. I have a cheap bluetooth model connected to my phone. Gives lots of real time information and I can be all "geekie" in the car s well.