The DME, or Electronic Motor Electronics, would be the unit that controls all aspects of your vehicle’s electrical functions. Typically known as an ECU in other cars, the DME (in BMW’s parlance) gets electrical alerts within the engine along with other factors to adjust the car or truck’s performance appropriately. https://bmw-ecu-bench-unlock89874.dm-blog.com/30476898/bmw-ecu-isn-for-dummies