Changing your car battery was a DIY task 15-20 years ago. Most new BMW's are fitted with a intelligent charging system called IBS (Intelligent Battery System), this system constantly monitors the health of the battery, its current charge status and its age, and this information is constantly monitored and fed back to the main vehicles' ECU and diagnostic system.
Import Service Center had the correct diagnostic equipment to register (re-code) the newly installed battery in my car.
The technicians were very thorough and painstakingly careful with the removal and replacement of parts.
I must say, this being my first time at ISC I had an immediate feeling these guys liked their jobs.