Originally Posted by Dunkinvenn
Your symptoms sound like mine. I would routinely see rough idle come and go, and SES was usually persistent but once or twice disappeared before I got it to the dealer.
My post just above got long so the TL;DR is that my experience suggests the carbon issue and injector issues are not necessarily related.
You might suggest to your SA that you've heard on e90post of cases where repeated injector failures were ultimately diagnosed as a DDE failure, and ask they open a PUMA case with BMW for advice. It took me a year to get the DDE fix.
In fact, the SA told me that they are planning to open a PUMA case and I should be patient (the car could be at the dealer for many days). At least, I will get alternate transportation for the duration of the service.