IF YOUR DASHBOARD IS SHOWING SERVICE BRAKE VISIT WORKSHOP DUE TO ANY OF THE FOLLOWING FAULT CODES ie C249F, C235C, C235A, C2359, C2498 (OPERATING TIME OF COMPONENT A7/3 IS EXCEEDED) THRESHOLD REACHED SBC HYDRAULIC PUMP THEN WE CAN HELP
The Sensotronic Brake Control unit is a unique unit. Mercedes-Benz were one of the first vehicle manufacturers to employ a brake-by-wire system on a car (W211, R230). Called sensotronic (SBC), the system no longer relies on the driver to produce hydraulic pressure.
The brake pedal is connected to the computer (ECU) by wire (brake-by-wire).
The sensors on the brake pedal will inform the computer how the pedal is pressed, for example how far, how fast etc. The computer will then dissipate the required force to each wheel via modulators.
The SBC module counts breaking cycles, after exceeding the value of 300000, an error message occurs. It is a kind of protection for the mechanical parts like the motor, inside the traction system hydraulic unit (A7/3). The contents of the message and the value of cycle limiter differs depending on the software version. It can be for example: “Brake defective stop vehicle” or “SBC defekt, sofort Händler aufsuchen”.
The Fault Code (DTC) that is stored is:
C249F OPERATING TIME OF COMPONENT A7/3 IS EXCEEDED (SBC HYDRAULIC UNIT)
We reset for £75 +vat.
– Welcome to HR Motors
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– HR Motors welcome Jack to the team
Jack has joined the team full time to finish his last 3 years apprenticeship to become a motor mechanic. Jack came to us last year one day a week on work experience were he was studying Motor Vehicle Repair level 1 at Border College.
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