Tasks of the SBC control unit (A7/3n1):
Records the driver's brake application via the SBC pedal value sensor (B37/1) and the front axle pre-pressure sensor (A7/3b1).
Supplies the ESP with data about how rapidly the driver wishes to brake and the brake pressures at the individual wheels (via its own CAN).
Supplies the ESP with the vehicle speed signal (directly and via its own CAN).
Carries out all control functions during normal braking.
Performs all pressure control functions for ABS, ASR, ESP and BAS control.
Passes on the brake lights signal to the rear SAM control unit with fuse and relay module (N10/2) to directly actuate the brake lights further and with the CAN via the ESP, SPS [PML] and BAS control unit (N47-5) (model 230) or ESP control unit (N47-5) (model 211).