Hydraulic System, Bleeding Without Brake Charger/Bleeding Unit

Special tools and workshop equipment required

Procedure

-- Fill the brake fluid reservoir with brake fluid up to the "max" mark.

Fig 1: Brake Fluid Reservoir

Courtesy of AUDI OF AMERICA, LLC

-- Screw down the container.

NOTE:

Use suitable bleeder hose. It must seat tightly on the bleeder screw so that no air can enter the brake system.

-- Remove the protective cap on brake caliper bleeder screw and attach the bleeder bottle bleed hose to the bleed screw.

Bleeding Sequence

1 - Left front brake caliper

2 - Right front brake caliper

3 - Left rear brake caliper

4 - Right rear brake caliper

NOTE:

Bleed the brake caliper at each bleed screw. If the brake caliper has two bleed screws, bleed the outer screw first.

-- Remove the cap -1- on each brake caliper bleed screw and connect the container bleed hose to the bleed screw.

Fig 2: Identifying Bleeder Screw Cap

Courtesy of AUDI OF AMERICA, LLC

-- Build pressure up in brake system by pumping brake pedal.

NOTE:

Slowly depress the brake pedal to prevent the formation of bubbles.

-- As soon as pressure is built up, hold brake pedal in depressed position.

-- Open the bleeder screw, with bleeder bottle hose connected, until the pressure is relieved (pedal drops).

-- Hold the pedal in completely depressed position and close the bleeder screw.

-- Release brake pedal and wait approximately 2 seconds so that brake fluid can flow out of the brake fluid reservoir.

-- Repeat the procedure until the brake fluid flows out clear and free of bubbles.

-- Tighten the bleeder screw, remove the bleeder hose and connect put the cap on the bleeder screw.

-- Repeat the bleeding procedure in the specified sequence for the other brake calipers.

-- Fill the brake fluid reservoir under consideration of brake pad wear up to the max marking and screw on the fuel cap.

-- Start the engine and check the brake pedal travel and pressure.

-- If the pedal travel is too long, check the brake system for leaks and repeat the bleeding procedure, if necessary.

-- Fill the brake fluid reservoir with brake fluid up to the "max" mark.

Fig 3: Brake Fluid Reservoir

Courtesy of AUDI OF AMERICA, LLC

-- Screw down the container.

NOTE:

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

Changing Brake Fluid

WARNING:

There is the risk of an accident.

Tightening Specifications