Mine just started to idle rough yesterday. It would be smooth and then every once in awhile it would hit a rough spot. Then the errors codes would start. "Bing, Bing, Bing" Man I wish I could turn that off.
The new coils and plugs will be in Friday night.
I'll keep you informed after a few days of driving it.

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Taz... My favorite BMW so far.
Sport, Cold weather, Logic 7

19" Miro M6 Wheels w/competition stems
MGP Claiper Covers (BMW)
Dension Gateway 500 and Audio Video Router
AC Schnitzer pedals
Carbon Fiber Di-Noc Trim
5W White Angel Eyes
Polk tweeters