The official notice
Defect
The electronic monitoring system of the Sensotronic Brake Control (SBC) is designed to monitor the pressure gradient within the high pressure line of the brake system. If an unacceptable pressure gradient is detected, the system will switch, as it is designed to do, into the hydraulic function mode. DaimlerChrysler AG has determined that in certain instances, if vehicles are not routinely serviced and have extremely high mileage combined with a high number of brake actuations or a high brake actuation frequency, the pump motor of the SBC may run out of permissible tolerances, thereby triggering the hydraulic function mode.
Safety Risk
No risk description available.
Remedy
Dealers will re-program the SBC hydraulic unit. A software update will provide a clear maintenance notice on the vehicle display and assure continuous pump speed operation within tolerances.