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Carrying Out Bleeding Operation - AR42.10-P-0010-02GWA

Model 463 as of model year 2016 up to model year 2019 

FRONT AXLE FIXED BRAKE CALIPER

Number Designation Model 461 (except 461.339) Model 463 up to model year 2019
BA42.10-P-1001-02B Bleed screw at front axle fixed brake caliper Nm 14
REAR AXLE FLOATING CALIPER

Number Designation Model 461 Model 463 (except 463.270/271/272/273)
up to model year 2019		 Model
463.270/271/272/273
up to model year
2019
BA42.10-P-1001-17B Bleed screw on rear axle floating caliper Nm 15 17
REAR AXLE FLOATING CALIPER

Number Designation Model 463
as of model year
2019
BA42.10-P-1001-17B Bleed screw on rear axle floating caliper Nm 11
  1. Set bleeding pressure on filling and bleeding unit to 2 bar.
  2. Remove dust caps of bleed screws (A, B, C, D) from brake calipers (1, 2, 3, 4).
  3. Attach bleeder wrench and bleed hose to bleed screw (D) on brake caliper (1).
  4. Open vent screw (D) on brake caliper (1).
    1. 5.1 Hydraulic system of brake system was not previously opened for repair purposes. To renew brake fluid, keep bleed screw (D) open until new brake fluid flows out.

      IMPORTANT Pumping the brake pedal not required.

      IMPORTANT Required total quantity of brake fluid: approx. 0.75 l.

    2. 5.2 Hydraulic system of brake system was opened for repair purposes.

      When bleeding hydraulic system of brake system, fully depress brake pedal several times in succession until new brake fluid exits free of bubbles at bleed screw (D).

      G13668479Courtesy of MERCEDES-BENZ USA

      NOTES To bleed the brake system correctly it is absolutely essential to pump the brake pedal throughout the entire bleeding process.

      Otherwise, brake system malfunctions and a failure of the brake system may occur due to remaining residual air.

      IMPORTANT To prevent air from being drawn in, do not pump the brake pedal in a jerking manner but instead release it slowly.

      IMPORTANT The bleed screw (D) can remain open during the entire pumping procedure.

      IMPORTANT Required total quantity of brake fluid: Approx. 1.5 l.

  6. Close bleed screw (D). TORQUE SPECIFICATIONTORQUE SPECIFICATION
  7. Repeat procedure at brake calipers (2, 3, 4).

    IMPORTANT The brake caliber numbering (1, 2, 3, 4) indicates the opening sequence.

    On vehicles with 3 bleed screws (A, B, C) on each brake caliper, it is also necessary to observe the following bleeding sequence:

    ↓

    1. Inner bleed screw (A).
    2. Outer bleed screw (B).
    3. Outer bleed screw (C).
  8. Detach bleed hose and bleeder wrench.
  9. Attach caps of bleed screws (A, B, C, D) to brake calipers (1, 2, 3, 4).
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