Mercedes-Benz R230, W211 manual Brake Operating Unit

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Brake Operating Unit

The Brake Operating Unit (BOU) consists of the following:

•Brake fluid reservoir (Do not overfill!)

• SBC pedal value sensor

• Tandem master cylinder

• Brake pressure simulator

(Note: no vacuum booster)

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Contents Sensotronic Brake Control SBCObjectives Contents SBC Incorporates these Functions Advantages of SBC Advantages of SBC Advantages of SBC Driving with SBC Wake-Up Driving with SBC Pre-Drive Check PDC Driving with SBC Delayed Off Function Page Page SBC Components W211 System Overview SBCR230 System Overview X11/4 Diagnosis Connection Brake Operating Unit BOU Brake Operating Unit Master Cylinder Fluid Reservoir Cover Pedal Value Sensor B37/1 BOU Tandem Master Cylinder Fluid reservoirNormal Braking Light Pressure Normal Braking Increased Pressure Normal Braking Strongest Feedback Emergency Operation Traction System Hydraulic Unit A7/3 Traction System Hydraulic Unit A7/3 Page Emergency Operation Circuit Brake Pressure Supply Three Pressure Stages Pressure Apply Rear Wheels Pressure Apply Front Wheels Pressure Apply All Wheels Pressure Hold All Wheels Pressure Reduction All Wheels Temperature Compensation Deactivation Deactivation Pressure at A7/3b2 System Activation System Activation Activation Left Front Activation Right Front Activation Right Rear Activation Left Rear Activation Recharge Bleeding the Brake System Proper system bleeding is critical Follow directions in SDSEquipment Required Connect equipment and follow steps in SDS Acronym List Appendix