Battery Cable problems of the 2009 BMW 328

While driving on the interstate, I accelerate and without warning, dashboard lights up with "service engine soon" and various other lights, power steering goes out, and I have to maneuver car across lanes of oncoming traffic to a safe shoulder. I turn on hazards, remove key and wait several minutes. The car turns over but doesn't start. I wait longer, turn off hazards, re-insert key and car starts up. I am able to continue driving, but avoid hard throttle. This happened 2 months ago, and I took it to a licensed mechanic who diagnosed as faulty fuel pump and replaced it. The car then had vacuum leak followed by a complete replacement of valve cover. The issue I experienced on the interstate was identical to what occurred before those repairs were done and bears a striking resemblance to issues described in the 2013 battery cable recall, yet my VIN # is not included.

While driving back from gulf shores alabama my headlights started flickering on and off while driving on the highway the power went off on the radio lights on the dashboard went off the steering wheel locked up and an sos button came on. The windshield wipers stopped and it was torrential rains and total darkness on interstate 75. When I could see well enough to get over to the brim I googled the codes that were flashing and was given further instruction on how to get my car started again. The headlights flickering on and off and visibility ( with the rain ) was impossible. Several various codes continued to pop up and this happened until we arrivd at our destination. It was if the whole computer board had gone haywire . Every code imaginable came on and we had to stop to figure out what to do to get the car going. Since then my BMW will not start unless the battery is charged. It says battery discharging or battery was disconnected so I have to keep battery cables with me at all times. So last night I'm having the airbag code come on which I do have a recall on that, as well. I have taken several pictures of the various codes involved which I will attach.

Car experienced complete electrical system failure. All systems shut down (lights, ignition, locks, dashboard, gauges, radio). Car could not be operated. Locks would not operate using dash mounted button, door pulls or key fob. Drivers door could only be opened from outside using valet key. Emergency lights inoperable. Problem occurred 10/29, started 2 hours later. Failed again 10/30 at 5pm. Restarted on 10/31. Dealer unable to duplicate. Car started 11/3 and failed 11/3. Battery checked--fine. Ibs checked--fine. (this car is not currently listed as part of the ongoing BMW battery cable recalls, but seems to exhibit exact same symptoms).