1Code C249F indicates that if the running time of component A7/3 exceeds the normal range in vehicles equipped with an SBC hydraulic system, there may be an internal failure within the control unit, requiring replacement of the SBC control module. 2The repair process can be simplified by using the W211/R230 TOOL, which allows for servicing without replacing the entire control module. 3Prior to performing any brake maintenance tasks such as replacing brake pads, brake discs, or brake fluid, it is essential to deactivate the SBC system. 4Technicians working on braking systems for these models must use appropriate tools to prevent personal injury and potential damage to the brake system. 5Before using this tool, the standard option for servicing SBC systems was the STAR-DIAGNOSIS tester. This device performs similar functions effectively, efficiently, and safely. 6This tool is designed for use with W211 (E-Class) and R230 (SL-Class) vehicles equipped with the SBC braking system. Operation is fast and straightforward, guided by LED indicators, ensuring safe handling. 7The OBDII diagnostic connector powers the device when plugged into the vehicle. It is lightweight, compact, convenient, and functions as a standalone unit.