Mercedes series 211, 219 and 230 - Reduced brake power
Mercedes Benz
Model series 211, 219 and 230
All models with electro-hydraulic brake system
Sensotronic Brake Control (SBC)
Message on instrument cluster:
"Reduced brake power/increased braking distance! Start engine!"
No error code issued in the control unit
If the above error message is displayed after a longer vehicle downtime period, this may be due to a leak inside the SBC hydraulic unit. The SBC pump my also start up more frequently without the brake being actuated.
In such cases, proceed as follows:
- Connect the diagnostic unit
- Start the engine
- Press the brake pedal repeatedly to increase the pressure in the pressure accumulator
- Read off the actual values/parameters (illustration)
- Pressure accumulator approx. 150 bar
- Read off the pressure in the pressure accumulator after 15, 30, 45 and 60 minutes
If the pressure drops by more than 7 bar within 60 minutes, the SBC hydraulic unit needs replacing.
Note
No other actions, e.g. opening/closing the doors or operating the brakes, must be performed during the pressure loss test.
Repair Tips
BMW Series All Models Driving Dynamics Control Failure DSC
Reading time: 1 minute
Repair Tips
Mercedes W213 - Brake pedal sluggish
A faulty coolant pump can cause coolant to enter the brake system's vacuum system. This affects the function of the brake pedal
Reading time: 1 minute
Repair Tips
Fiat 500 X - noise when braking
The Fiat 500 X may make squeaking noises when braking at low speed. What action must be taken and what may be the cause?
Reading time: 1 minute
Repair Tips
Reading time: 1 minute
Repair Tips
Mercedes Benz A Class Thermal overload
Reading time: 1 minute
Repair Tips
Lancia Ypsilon Vibrations and noises on the rear axle
Reading time: 1 minute
Repair Tips
Opel Corsa D Vibrations and noises
Reading time: 1 minute
Repair Tips
Opel Astra J Electric parking brake indicator lamp illuminates, brake light flickers
Reading time: 1 minute
Repair Tips
Opel Corsa D Stop lights constantly lit
Reading time: 1 minute
Repair Tips
Opel Corsa D The drum brake cannot be loosened or released
Reading time: 1 minute