Brake System, Bleeding with Brake Filler/Bleeder Unit VAS 5234 or Brake Filler/Bleeder Unit Suction Adapter V.A.G 1869/4

Brake System, Bleeding with Brake Filler/Bleeder Unit VAS 5234 or Brake Filler/Bleeder Unit Suction Adapter V.A.G 1869/4

Special tools, testers and auxiliary items required

• Brake filler/bleeder unit (VAS 5234) or

• Brake filler/bleeder unit (V.A.G 1869)

• Brake filler/bleeder unit suction adapter (V.A.G 1869/4)

• Vehicle diagnostic, test and information system (VAS 505x)

Procedure

- Connect (VAS 5234) or (V.A.G 1869/4).

- Remove protective cap on brake caliper bleeder screw.

- Connect bleeder bottle hose to brake caliper bleeder valve.

- Leave the bleeder screw open, with brake fluid hose connected, until brake fluid flows out clear and free of air bubbles.

- Press brake pedal 5 times to assist bleeding procedure.

- Tighten bleeder screw to 10 Nm.

- Remove bleeder hose and install protective cap on bleeder screw.

- Repeat bleeding process on remaining brake calipers.

Bleeding Sequence

1 Left front brake caliper
2 Right front brake caliper
3 Left rear brake caliper
4 Right rear brake caliper

- Fill brake fluid reservoir up to max. marking and install sealing cap.

- Start engine to check brake pedal travel and pressure.

- If pedal travel is too long and pressure is too weak, check brake system for possible leaks. Repeat bleeding procedure.

After bleeding brake system, perform zero adjustment on Brake Pressure Sensor 1 (G201) via the Guided Fault Finding function with the (VAS 505x).

• A road test must be performed after bleeding. During this, at least one ABS regulation must be performed at all four wheels!

Make sure the brakes are working correctly before driving the vehicle for the first time.