MERCEDES C-CLASS W204 - How To Replace Front Brake Discs & Pads Change Swap Replacement (295mm Disc)

Introduction

In this tutorial, we will guide you through the process of replacing the front brake discs and pads on a Mercedes-Benz C-Class W204, specifically those with a 295mm diameter disc. Proper brake maintenance is crucial for vehicle safety and performance. With the right tools and steps, you can complete this task efficiently.

Step 1: Gather Necessary Tools

Before starting the replacement, ensure you have the following tools on hand:

• 13mm Socket
• 17mm / 18mm Socket
• T30 Torx
• 17mm Spanner
• Flat Screwdriver
• Mole Grips
• Brake Cleaner
• Hammer

You can find these tools online or at an automotive store. Having the right tools will make the process smoother and more efficient.

Step 2: Prepare the Vehicle

1. Safety First: Park the vehicle on a flat surface and engage the handbrake.
2. Wheel Removal:
   • Loosen the wheel nuts using the appropriate socket (17mm or 18mm).
   • Use a jack to lift the vehicle and secure it with jack stands.
   • Remove the wheel completely.

Step 3: Remove the Brake Caliper

1. Caliper Bolts: Locate the caliper mounting bolts (typically 13mm).
2. Remove the Bolts: Use the 13mm socket to unscrew and remove the bolts.
3. Caliper Detachment: Carefully slide the caliper off the brake disc.
   • Tip: Hang the caliper using a hanger or suspend it with wire to avoid putting stress on the brake line.

Step 4: Remove the Old Brake Pads

1. Remove Pads: Take out the old brake pads from the caliper bracket.
2. Inspect Components: Check the condition of the caliper and bracket for any wear or damage.

Step 5: Remove the Brake Disc

1. Disc Retaining Screw: If present, use a T30 Torx to remove the screw that holds the brake disc in place.
2. Disc Removal: Gently slide the disc off the wheel hub. You may need to tap it lightly with a hammer if it is stuck.

Step 6: Install New Brake Disc

1. Clean the New Disc: Use brake cleaner to remove any protective coating from the new disc.
2. Position the New Disc: Place the new brake disc onto the hub, ensuring it is seated correctly.
3. Secure with Screw: If applicable, use the T30 Torx to secure the disc in place.

Step 7: Install New Brake Pads

1. Insert New Pads: Place the new brake pads into the caliper bracket.
2. Check Alignment: Ensure that the pads are properly aligned and fit snugly.

Step 8: Reattach the Brake Caliper

1. Caliper Positioning: Slide the caliper back over the new pads and disc.
2. Tighten Bolts: Reinsert and tighten the caliper bolts using the 13mm socket.

Step 9: Reinstall Wheel

1. Position Wheel: Place the wheel back onto the hub.
2. Secure Wheel Nuts: Hand-tighten the wheel nuts and then lower the vehicle.
3. Final Tightening: Once the vehicle is on the ground, use the 17mm or 18mm socket to fully tighten the wheel nuts in a criss-cross pattern.

Step 10: Test the Brakes

1. Pump the Brakes: Before driving, pump the brake pedal several times to ensure pads are seated properly.
2. Check for Issues: Look for any unusual noises or brake response issues before taking the vehicle on the road.

Conclusion

Replacing the front brake discs and pads on a Mercedes-Benz C-Class W204 is a manageable task with the right tools and steps. Always prioritize safety and ensure proper maintenance of your vehicle's braking system. Regular checks and replacements can enhance your vehicle's performance and ensure your safety on the road. If you're uncertain at any step, consult a professional mechanic.