Note: When bleeding the rear brakes, push the pressure regulator lever vigorously toward the spring.
Remove air from the hydraulic brake system under pressure in accordance with the instructions of the manufacturer of the unit being used.
Fill the system with brake fluid under a pressure of 2.5 kg/cm² through the nipple screwed onto the brake hydraulic reservoir.
Remove air first from one circuit, then from the other, starting each time from the wheel furthest from the master cylinder, observing the following sequence: brake cylinders of the right rear, left rear, right front and left front wheels.
During bleeding, check and, if necessary, top up the fluid in the tank to the required level.
Do not reuse brake fluid that has been drained from the system.
After removing air from the system, place protective caps on the air bleed nipples.
After bleeding, press the brake pedal several times to set the pistons to the working position and add brake fluid to the reservoir to the normal level.
Check the operation of the service brakes while driving.
[The original version of the article is posted on the website: AudiManual]