This guide provides detailed instructions on how to bleed the SBC brake system in Mercedes-Benz vehicles that are equipped with an SBC pump, such as the E-Class W211, SL-Class R230, or CLS-Class. By following these instructions, you can ensure that your vehicle’s brake system is working optimally and prevent potential issues down the road. Below you can see how to carry SBC bleeding using the YOUCANIC full system scanner but keep in mind that you may be able to bleed the SBC brakes without a scanner as outlined in this guide.
What you will need
Bleeding air from a brake system is an important maintenance procedure that helps to ensure the optimal performance of the braking system. If your vehicle is equipped with an ABS pump, bleeding air from the brake system can be a bit more complicated. However, with the right tools and knowledge, it can be a relatively straightforward process. Here are the steps to bleed the ABS pump using a diagnostic scanner:
- Prepare your vehicle: Ensure that your vehicle is parked on a level surface and the engine is turned off. Also, make sure that you have the correct diagnostic scanner for your vehicle’s make and model.
- Connect the diagnostic scanner: Connect the diagnostic scanner to the OBD-II port of your vehicle. This port is typically located under the dashboard, near the driver’s side door.
- Select the Maintenace > ABS Service function: Use the scanner to select the ABS pump leed function. This will activate the SBC pump and allow you to purge any air that may be trapped in the system.
- Open the brake fluid reservoir: Locate the brake fluid reservoir and remove the cap. This will allow the brake fluid to flow more freely during the bleeding process.
- Begin bleeding the brake system: Starting with the wheel farthest from the master cylinder, loosen the bleeder valve using a wrench. Connect a clear plastic hose to the valve and submerge the other end of the hose in a container filled with brake fluid.
- Activate the SBC pump: Once the valve is open, activate the SBC pump using the diagnostic scanner. The pump will push the brake fluid through the system, purging any air that may be trapped in the lines.
- Close the valve: Once you see a steady stream of brake fluid without any air bubbles coming out of the hose, close the bleeder valve using the wrench. Move to the next wheel and repeat the process, working your way around the vehicle until you have bled all four wheels.
- Check the brake fluid level: After bleeding all four wheels, check the brake fluid level in the reservoir and add more brake fluid if necessary.
- Test the brakes: Finally, test the brakes to ensure that they are working correctly. If the brakes feel spongy or unresponsive, repeat the bleeding process until you have purged all the air from the system.
Bleeding the SBC pump using a diagnostic scanner is a straightforward process that can help ensure the optimal performance of your vehicle’s braking system. However, it is important to follow the instructions provided by your vehicle’s manufacturer and to exercise caution when working with brake fluid and other vehicle components. If you are unsure about any aspect of the bleeding process, it is always a good idea to consult a qualified mechanic or technician for assistance.
Why do you need to bleed SBC brakes?
You need to bleed the ABS pump in order to remove any air that may be trapped in the brake lines, which can affect the performance of your vehicle’s braking system. Air can enter the brake lines during routine maintenance such as brake pad replacement, or due to a leak in the system. If air is present in the brake lines, it can create a soft or spongy feeling in the brake pedal, reduce the effectiveness of the brakes, and increase the distance required to come to a complete stop.
When bleeding the brake system, it is important to remove all the air that may be trapped in the system, including any air that may be trapped in the ABS pump. The ABS pump is a complex component that is designed to prevent the wheels from locking up during emergency braking, and it contains many small passages and channels through which brake fluid flows. If air is trapped in the pump, it can interfere with the normal operation of the system and may cause the ABS warning light to turn on.
By bleeding the ABS pump, you can ensure that the brake system is working optimally and that you have reliable braking performance. It is important to follow the manufacturer’s instructions and to use the correct equipment when bleeding the ABS pump to avoid damaging the system or causing other issues with your vehicle’s brakes. If you are unsure about the bleeding process, it is always a good idea to consult a qualified mechanic or technician for assistance.
Which Mercedes-Benz models are equipped with SBC brakes?
Mercedes-Benz introduced the Sensotronic Brake Control (SBC) brake-by-wire system in the early 2000s, and it was used in several of their vehicle models. Here are some examples of Mercedes-Benz models that may have been equipped with SBC brakes: E-Class (W211, W212) CLS-Class (W219, W218) SL-Class (R230, R231) SLK-Class (R171) CL-Class (C215, C216) S-Class (W220, W221) G-Class (W463) M-Class (W164) It is important to note that not all vehicles within these model ranges were necessarily equipped with SBC brakes, as the system was not included in all trim levels or model years. If you are unsure whether your Mercedes-Benz vehicle has an SBC brake system, you can consult your owner’s manual or contact a Mercedes-Benz dealership or mechanic for more information.
Have questions about your car? Get assistance in our newly launched forum section. We’re here to provide support!