Rear Brake Caliper Piston: Removing
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 Audi S4, 2013 Audi A4, 2012 Audi S4, 2012 Audi A4, and 2011 Audi S4. However, it is still accessible from the selected car via links, so may be relevant.
-- Remove pistons as far as possible from brake caliper
-- Force piston out of brake caliper housing using compressed air.
NOTE:
When removing, make sure that surface of cylinder is not damaged.
Place a wooden board into the recess of the caliper housing so it is not damaged.
-- Remove old seal from brake caliper with 3409.