FixVault

Testing Values and Process Specifications Table:

WARNING: This page is about a different car, the 2022 Audi RS 6 Avant and 2021 Audi RS 6 Avant. However, it is still accessible from the selected car via links, so may be relevant.
Service: Fluid Level Specified Value:
Delivery service Fluid level at the MAX mark.
Changing the brake fluid Fluid level between the MAX and MIN mark, consistent with the wear condition of the brake pads.

The leak test for the brake system is a repair procedure and should be charged separately.

Procedure: 

-- Check the brake fluid level based on the markings -arrows- in the brake fluid reservoir.

Fig 1: Brake Fluid Reservoir Level MIN & Max Marks
GWWA00-10279Courtesy of AUDI OF AMERICA, LLC

-- Perform the following actions depending on the test result:

Fluid level: Evaluation / Action:
Over the MAX mark Extract the brake fluid.
Under the specified level Perform a leak test for the brake system. Refer to LEAK TEST .
NOTE:

Due to wear and the automatic adjustment of the brake pads while driving, the brake fluid level lowers.