Brake Bleeding: Service and Repair

WM 470107 Bleeding the brake system

Checking brake fluid level

Information

- The brake fluid level must not exceed the MAX mark.

- Observe brake fluid quality. Use only new DOT 4 brake fluid.

- This brake fluid is available under the following part numbers: Quantity supplied: 1 litre = 000.043.203.66; 30 litres = 000.043.203.67.





Installation position of brake fluid reservoir

1. Visually check the brake fluid level. The brake fluid level must be between the MIN and MAX markings -1-. The brake fluid reservoir is located under the left plenum panel cover.





Min/Max markings for brake fluid

Bleeding the brake system

Information

- Observe brake fluid quality. Use only new DOT 4 brake fluid.

- This brake fluid is available under the following part numbers: Quantity supplied: 1 litre = 000.043.203.66; 30 litres = 000.043.203.67.

- Drain brake fluid from every brake caliper at both bleeder valves.

- Bleed the outer bleeder valve first.

1. Open the reservoir cap -1- -2-.





Brake fluid reservoir

2. Connect a bleeding device to the reservoir -2-.
3. Switch on the bleeding device. Bleeding pressure is approx. 2.0 bar.
4. Continue changing the brake fluid at the brake calipers. Do so in the following sequence: rear right/rear left/front right/front left.
5. Open each bleeder valve until clear, bubble-free brake fluid emerges.
6. Use a transparent hose and a collecting bottle to check the escaping brake fluid accurately for cleanliness, freedom from air bubbles and to determine the brake fluid used.
7. Tighten the bleeder valves to the specified tightening torque -> 47 Tightening torques for brake hydraulic system - Refer to Specifications and remove the bleeder hoses.
8. Switch off the bleeding device and remove the adapter at the reservoir. The brake fluid level in the reservoir must be between the MIN and MAX markings after filling and bleeding the vehicle -1-. Correct the brake fluid level if necessary.





Min/Max markings for brake fluid