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The SBC H has complex functionality, in particular if it is malfunctioning. It has more than 10 partial health stages. Depending on the error that occurred, the SBC system switches to one of them, for example, on a stage where the system is fully operational, or a "hydraulic stage" when the standard brake hydraulic actuator is activated instead of the electronic one. The maximum speed of Mercedes E-class W211 shall be limited to 90 km/h.