Replacing the rear brake disc on a 2017 C 200 model.

[Cincoon]

I want to replace the rear brake pads and discs on my vehicle and have discovered the process of disabling the sensotronic brake control system. I would want to know the specific functionality and purpose of this. Does anybody have a response to this inquiry, please?

[AmericaMonster]

Did you have the Sensotronic Brake Control (SBC) system installed on a 2017 C class vehicle?

[Cincoon]

I have it, and I can turn it off.
"What is it actually doing?" was the question.
I can only hear a buzzing sound.

[AmericaMonster]

I am certain that SBC was not accessible on the C class. Are you certain that the sound you are hearing is not coming from the electric handbrake?

[Cincoon]

I am uncertain. I purchased the brake pads and discs from my Mercedes-Benz dealer. Along with the pads, I received a booklet with a cautionary notice to disable the Sensotronic Brake Control (SBC) system. When I searched on Google and clicked on a YouTube instructional, the "how to" video appeared as expected. I followed the instructions and, lo and behold, it performs just as expected.

[AmericaMonster]

Can I ask what the procedure you used to deactivate SBC?

[Cincoon]

Turn the ignition key to position 1.
Disengage the parking brake.
Three Activate the trip metre display on the dashboard readout using the controls located on the steering wheel. Simultaneously press and hold the phone answer button and the ok button for a brief duration. This action will prompt the appearance of a menu containing five options, one of which is labelled as "rear brake pad setting" or similar. Proceed by following the instructions displayed on the screen. Upon successful deactivation, a sound will be emitted from the rear of the car. After completing the replacement of the brake pads and discs, return to the dashboard and adhere to the instructions provided to reactivate the brake pad setting.When you will hear that sound once again. Simply return to the regular screen.

I have completed my task, and it took me a total of 2 hours, which I consider to be a satisfactory amount of time. Additionally, I took a break to have a cup of tea.

[AmericaMonster]

Now I see. That is the correct technique for activating the electronic handbrake and it is unrelated to the sensotronic braking system, which is not present in your automobile. In response to your original inquiry, the function of the mechanism is to fully retract the handbrake, allowing for the replacement of the rear brake pads. Subsequently, when the system is activated once more, it retracts the motor to accommodate the increased thickness of the new pads.
The SBC is a distinct entity that is never associated with the C class. The brochure you received with your pads included incorrect information. Hopefully, this information may assist you with your first inquiry.

[Cincoon]

Now that we understand its function, we can attribute the whirring noise coming from the back to it. Thank you for providing clarification.
I must confess that initially, I had doubts about my ability to do the task until I searched for a tutorial on YouTube.