Attention: Do not empty the tank to the end, so that air does not get into the brake system.
Fill the reservoir with fresh brake fluid up to the MAX mark.
Attach a clean hose to the right rear brake caliper bleeder valve and use a suitable container.
Have an assistant depress the brake pedal several times until pressure is built up. While keeping the pedal depressed, at the same time unscrew the bleeder valve with a ring wrench (1) and let the brake fluid flow out through the hose. Close the valve when the pedal is at the floor. Take your foot off the pedal. Repeat this process until fresh, lighter colored brake fluid comes out of the hose.
Tighten the air vent valve, fill the tank with fresh fluid.
Remove the brake fluid from the rest of the calipers in the same way.
Attention: The escaping brake fluid must be clean and free of bubbles.
Attention: Change the brake fluid in the hydraulic clutch system in the same way.
Brake fluid is poisonous and must be disposed of in designated places, but never in domestic sewers.