Brake System, Bleeding With Brake Filler/Bleeder Unit Vas 5234 Or Brake Filler/Bleeder Unit Suction Adapter V.A.G 1869/4

Special tools and workshop equipment required

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.

NOTE:

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

WARNING:

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