Replacing the brake lines on a Mercedes Benz S-Class S500 W220 Lang OEM is a detailed process that requires careful attention to safety and mechanical principles. click here for more details on the download manual…..
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Below is a step-by-step guide that includes the necessary tools and detailed descriptions for each tool.
### Tools Needed
– **Brake Line Wrench (Flare Nut Wrench)**
– A specialized wrench designed to fit over the brake line fittings, preventing rounding of the nuts and providing better grip.
– **Ratcheting Wrench Set**
– A set of ratcheting wrenches that allows for quick tightening and loosening of nuts and bolts without needing to reposition the wrench.
– **Socket Set**
– A variety of sockets for different sizes of bolts and nuts, particularly useful for removing components that might obstruct access to the brake lines.
– **Brake Line Cutter**
– A tool specifically designed to cut through metal brake lines cleanly without deforming the line, ensuring a smooth surface for fittings.
– **Pipe Bender**
– A tool that allows you to bend new brake lines into the correct shape to fit your vehicle without kinking the line.
– **Brake Fluid**
– The specific type of brake fluid recommended by the manufacturer, which is crucial for the brake system’s function.
– **Brake Line Fittings**
– New fittings that match the specifications of the original equipment. These are necessary if the existing fittings are corroded or damaged.
– **Safety Glasses**
– Protective eyewear to guard against debris and brake fluid, which can be harmful.
– **Gloves**
– Nitrile or rubber gloves to protect your hands from brake fluid and dirt.
– **Shop Towels/Rags**
– For cleaning up spills, wiping down components, and ensuring a clean work area.
– **Jack and Jack Stands**
– A hydraulic jack to lift the vehicle, and jack stands to securely hold it in place while you work underneath.
– **Torque Wrench**
– A precision tool to ensure that all bolts and fittings are tightened to the manufacturer’s specifications.
### Steps to replace Brake Lines
– **Preparation**
– Park the vehicle on a level surface, engage the parking brake, and put on safety glasses and gloves.
– **Lift the Vehicle**
– Use the hydraulic jack to lift the vehicle and place it on jack stands to ensure stability while you work underneath.
– **Locate Brake Lines**
– Identify the sections of the brake lines that need to be replaced. This can typically be found running along the chassis and connecting to the brake calipers.
– **Remove Old Brake Lines**
– Using the brake line wrench, loosen the fittings at both ends of the brake line.
– If the lines are corroded, it may be necessary to apply penetrating oil to help break the connection.
– **Cut the Brake Lines**
– If the lines are damaged, use the brake line cutter to remove the damaged sections. Ensure the cuts are straight for proper fitting of new lines.
– **Prepare New Brake Lines**
– Measure and cut the new brake line to the appropriate length.
– Use the pipe bender to create bends that match the routing of the original lines without causing kinks.
– **Install New Brake Lines**
– Attach the new brake lines to the fittings, ensuring a secure connection. Use the brake line wrench to tighten the fittings without over-torquing.
– **Refill Brake Fluid**
– Open the brake fluid reservoir
and refill with the correct type of brake fluid. Make sure to keep the reservoir cap off until the bleeding process is complete.
– **Bleed the Brakes**
– Start bleeding the brakes by having an assistant pump the brake pedal several times and hold it down while you open the bleeder valve on the caliper.
– Close the valve before your assistant releases the pedal. Repeat this process until there are no air bubbles in the fluid.
– **Check for Leaks**
– Once the lines are installed and the system is bled, inspect all connections for leaks. If there are any, address them before proceeding.
– **Test the Brakes**
– Before driving, pump the brake pedal to ensure it feels firm and responsive. Test drive the vehicle at low speed to ensure proper operation.
– **Finish Up**
– Once satisfied with the installation and testing, lower the vehicle and remove the jack stands. Dispose of old brake fluid and materials properly.
### Conclusion
Replacing brake lines on a Mercedes Benz S-Class S500 W220 requires precision and attention to detail. Following these steps with the right tools will help ensure a successful replacement. Always refer to the vehicle’s service manual for specific instructions and torque specifications. If you’re uncertain about any step, it’s advisable to consult a professional mechanic.
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