Thanks for the quick replies! Very helpful to know, and certainly puts my mind at ease.
SBMGBs - I searched for what that dpf regen is...hadn't heard of it before. Generally, how long should I leave my car running in the morning before driving, and also, before shutting it off? The BMW dealership didn't have the manual for the car, so they had to order one (otherwise I'm sure this is all in there...). The whole diesel nuances thing is still greek to me; your patience is much appreciated.