Its not a normal MOT thread as such. Just something that popped in to my head. Am I right in thinking that MOT tester can't do the smoke test on my cause its an Auto? Or is it cause its a diesel, I can't remember but I do remember something being read or said that they can't do it cause or something my car has. I think its cause of the auto, it never concerned me before but someone mentioned that auto's don't like being revved for long periods of time (Smoke test) when in park. Does any one know, is there any truth in this?