Brake Master Cylinder, Removing And Installing, With Electromechanical Brake Master Cylinder: Removing

-- Remove the plenum chamber bulkhead. Refer to PLENUM CHAMBER BULKHEAD, REMOVING AND INSTALLING .

-- Remove the brake fluid reservoir. Refer to BRAKE FLUID RESERVOIR, REMOVING AND INSTALLING .

-- To prevent brake fluid from escaping, place enough lint-free cloths in the area under the brake master cylinder.

RHD vehicles

-- Free up the coolant hoses in the area of the brake master cylinder.

Continuation for all vehicles 

Courtesy of AUDI OF AMERICA, LLC

-- Remove the brake lines -arrows- from the brake master cylinder -3-.

-- Remove the bolts -1 and 2-.

-- Carefully remove the brake master cylinder -1- from the brake booster.

-- Immediately close open connection points with a clean plug.