MERCEDES-BENZ recall on CLS CLASSE CLASS, and SL CLASS models

On certain vehicles, the Sensotronic Brake Control (SBC) unit may contain a pump piston which is out of permissible tolerances. Also, vibrations within the electrical connector may cause a loss of electrical continuity. Both conditions may result in the system reverting to hydraulic function mode. A loss of brake power assist would result in increased pedal effort and extended stopping distance. Correction: Dealers will inspect and, if required, replace the SBC pump unit.