Has anyone just tried the obvious and replaced the CPS? Remember when Oledoc suggested your injectors were over heating and you said you had never heard of that before? Sometimes the obvious is what it really is..... it is a cheap and quick thing to rule out, and it does have the symptoms. And you just stated on here that a an MB person told you there were recalls on CPS sensors.... But, I may be all wrong... I have had an AIT sensor come loose and cause all kinds of missing rough idle problems as well.... The boost will sometimes break the tab, and push it out enough to leak....