Time for an update. Took my car in for warranty service at McKenna BMW and they found no issues with the comfort access system. Even though I was able to present the problem to the SA when I dropped my car off for service, the tech found no issue and said the comfort access system was working normally. Of course, when I went to pick my car up, the problem was still alive and well on the drive side door. So confusing....
I'll be bringing my M back in for an oil change in about 1-2 months, so I'll take another shot at the problem then. Will keep the thread updated.
Last edited by m45; 10-24-2012 at 10:55 PM.