Changing a battery

I appreciate the term "safely deal" as the stuff needs to be reconnected correctly. Now if you can have the car taken to someone to install and register the battery, that would be ideal. The electronic sophistication in the E-9x cars is such that the battery requires registration to maximize the life of the battery, that may not be possible and I understand. BMW cars are not like dads' Oldsmobile, they have more electrical consumers that are sensitive to voltage excursions and modules that require special training and equipment, even just to change the battery. I recommend seeking out a trained BMW professional to protect your investment, and your peace of mind.