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We can see there are many new automotive terms nowadays, (starting from ABS to ESP, ESC....) so I thougt we could post the definitions of misc automotive terms so we can follow everything. I appreciate your contribution to this thread, thanks. BTW, moderators, please make it sticky.
I'll start:

ABC (Active Body Control)- is a fully-active suspension, by Mercedes-Benz, that allows to control the vehicle body motions and therefore virtually eliminates body roll in many driving situations including cornering, accelerating, and braking. The system’s computer detects body movement from sensors located throughout the vehicle, and controls the action of the active suspension with the use of hydraulic servos. The hydraulic pressure to the servos is supplied by a high pressure radial piston hydraulic pump. A total of thirteen sensors continually monitor body movement and vehicle level and supply the ABC controller with new data every ten milliseconds.