Brake Bleeding: Service Precautions

Brake System, Bleeding

Vehicles with ABS and ABS/EDL
When at least one chamber in the brake fluid reservoir is completely empty (e.g. leaks in braking system) the hydraulic unit must be bled using the VAG 1551 scan tool in function 04, "basic setting".

WARNING!
^ Do not exceed a filling pressure of 1 bar (14.5 psi) when filling with brake fluid using pressure bleeder US1116. The brake system will not be completely bled if excessive pressure is used.

Basic Setting
ABS/EDL On Board Diagnostic (OBD) Refer to Antilock Brake System; Testing and Inspection.

Note:
^ Bleeding the brake system on vehicles with ABS is the same as for vehicles with conventional braking systems.
^ Brake fluid absorbs moisture from the air and must therefore be replaced every two years. Use only new, unused and approved brake fluid that complies with MVSS 716 DOT 4.
^ Brake fluid is poisonous. Also due to its corrosive effect brake fluid must not come into contact with paint work.
^ Brake fluid must always be stored in air tight containers.
^ Do not use silicone-based brake fluid (DOT 5). Even the smallest trace can cause severe corrosion in the brake system.
^ Rinse off brake fluid spillage using plenty of water.