Testing Values and Process Specifications Table:

The table value is based on one brake caliper, that means the extracted fluid amount for both bleed screws per brake caliper must together match the set value from the table.

Bleed Screw Sequence:		Extracted Brake Fluid Amount:
Brake caliper
Driver side front axle	1.	0.20 liter
Front passenger side front axle	2.	0.20 liter
Driver side rear axle	3.	0.30 liter
Front passenger side rear axle	4.	0.30 liter
Clutch slave cylinder	5.	0.15 liter

→ Automatic transmission total quantity		1.00 liter
→ Manual transmission total quantity		1.15 liters

Step 1 - Brake Charger/Bleeder Unit, Connecting:

The brake fluid reservoir is located under the left plenum chamber cover.

-- Open the door on the left side of the plenum chamber cover.

-- Remove the cap -image- from the brake fluid reservoir.

Fig 1: Brake Fluid Reservoir

Courtesy of AUDI OF AMERICA, LLC

-- When the screen is installed, extract the brake fluid from the reservoir using the suction hose from the :VAS5234 until the fluid level meets the lower edge of the screen. Make sure that no brake fluid runs through the screen after extracting.

Fig 2: Extracting Brake Fluid Using Brake Charger/Bleeding Unit VAS 5234

Courtesy of AUDI OF AMERICA, LLC

-- Attach the adapter -1- to the brake fluid reservoir.

Fig 3: Identifying Adapter To Brake Fluid Reservoir And Filler Hose on Brake Charger/Bleeding Unit VAS 5234

Courtesy of AUDI OF AMERICA, LLC

-- Connect the hose -2- of the :VAS5234 to the adapter.

-- Adjust the pressure on the :VAS5234 . Refer to the brake charger/bleeder unit owner's Literature for the pressure value.

Step 2 - Brake System, Bleeding and Filling:

If there are two bleed screws per brake caliper: Bleed the inner bleed screw first and then the outer.

-- Raise the vehicle. Refer to VEHICLE, LIFTING .

Front Axle:

-- Driver side brake caliper: Remove the cap(s) -1- for the bleed screw(s).

Fig 4: Identifying Bleeder Screw Cap

Courtesy of AUDI OF AMERICA, LLC

-- Install the container bleed hose -1- on the bleed screw from the inside of the rim.

Fig 5: Identifying Collector Bottle Bleeder Hose

Courtesy of AUDI OF AMERICA, LLC

-- Open the bleed screw and let the brake fluid flow out. The amount of extracted fluid can be found in the table. Refer to Testing Values and Process Specifications Table: .

-- Close the bleeder screw.

-- If there are two bleed screws per brake caliper, repeat the procedure for the second bleed screw.

-- Reattach the cap for the bleed screw(s).

-- Repeat the procedure on the front passenger side.

Rear Axle:

-- Driver side brake caliper: Remove the cap(s) -1- for the bleed screw(s).

Fig 6: Identifying Bleeder Screw Cap (Rear)

Courtesy of AUDI OF AMERICA, LLC

-- Select the reversible ratchet and the corresponding socket from the :VAS6564 and connect them.

-- Guide the bleeder hose -1- from the inside of the rim through the reversible ratchet -2- and the socket -3- and attach it to the bleed screw.

Fig 7: Bleeding Rear Brakes

Courtesy of AUDI OF AMERICA, LLC

-- Open the bleed screw with the ratchet -2- and drain the brake fluid. The amount of extracted fluid can be found in the table. Refer to Testing Values and Process Specifications Table: .

-- Close the bleeder screw.

-- If there are two bleed screws per brake caliper: Working from the outside of the rim, position the reversible ratchet -2- and socket -3- and repeat the procedure.

Fig 8: Bleeding Rear Brakes

Courtesy of AUDI OF AMERICA, LLC

-- Reattach the caps on the brake caliper bleed screw(s).

-- Repeat the procedure on the front passenger side.

Step 3 - Clutch Slave Cylinder, Bleeding

Only applies to vehicles with a manual transmission.

-- There are necessary removal procedures to access other components. Refer to the appropriate service information .

-- Attach the reservoir bleeder hose -1- to the clutch slave cylinder bleeder screw.

-- Open the bleed screw and allow the appropriate amount of brake fluid to flow out. Refer to Testing Values and Process Specifications Table: for the Testing Values and Process Specifications Table.

-- Close the bleed screw and install the cap.

Step 4 - Final Procedures:

-- Close the filler lever on the :VAS5234 .

-- Remove the filler hose from the adapter.

-- Remove the adapter from the brake fluid reservoir.

-- Check the brake fluid level and correct if necessary, while considering the brake pad wear. Refer to BRAKE FLUID LEVEL, CHECKING .

-- Install the brake fluid reservoir cap.

-- Press the clutch pedal several times.

-- Check the pedal pressure and the free play on the brake pedal. Free play: maximum ¹ /₃ of the pedal travel.

-- Before driving the vehicle for the first time: Make sure the brakes are working correctly.

-- If there is too much brake pedal free play or the brake function is faulty, check the brake system for leaks and change the brake fluid again.

NOTE:

The bleeder hose must fit tightly over the bleed screw to prevent air from getting into the brake system.

For certain tire combinations, it may be necessary to remove the wheels.

Depending on the vehicle equipment, the rear brakes or front and rear brakes may be bled without removing the tires using the :VAS6564 .

Use original Audi brake fluid. Refer to the Parts Information.

Used brake fluid may not be used again.

Observe the disposal regulations for brake fluid.