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Mercedes Benz cars have W211 and R230 with ABS \ SBC system , if using DAS test, the instruction as follows
TIPS:CODE C249F, OPERATION TIME OF COMPONENT A7/3 IS EXCEEDED (SBC HYDRAULIC UNIT) The above tips that show internal fault of control unit, you have to replace the SBC control module and using W211/R230 Reset method via DAS Software that can be easily repaired without replace the new control module.
Benz sbc reset