– Remove protective cap -1- from bleeder screw on relevant
brake caliper and fit hose from reservoir onto bleeder screw.
Bleeding sequence
1 - Front left brake caliper
2 - Front right brake caliper
3 - Rear left brake caliper
4 - Rear right brake caliper
Note
Bleed brake caliper at each bleeder screw. If brake caliper has
two bleeder screws, first bleed at outer screw.
– Build up pressure in brake system by pumping brake pedal.
Note
Press brake pedal slowly to avoid formation of bubbles.
– Once pressure has built up, keep brake pedal depressed.
– Open bleeder screw with hose of reservoir attached until pres‐
sure has dissipated (pedal sags).
– Keep pedal depressed and close bleeder screw.
– Release brake pedal and wait approx. 2 seconds to allow
brake fluid to flow in from brake fluid reservoir.
– Repeat procedure until emerging brake fluid is clear and free
from bubbles.
– Tighten bleeder screw, detach bleeder hose and fit protective
cap on bleeder screw.
– Repeat bleeding procedure in stated sequence at other brake
calipers.
– Fill brake fluid into brake fluid reservoir up to “max” marking.
– Close reservoir.
– Start engine and check brake pedal travel and brake pedal
pressure.
– In the event of excessive pedal travel, check brake system for
leaks and/or repeat bleeding procedure.
WARNING
Risk of accident!
♦ Make sure that the brakes work properly before the vehicle
is driven on the road.
8.3 Changing brake fluid
Brake fluid change
⇒ Maintenance ; Booklet 405 ; Work descriptions; Changing
brake fluid (every 2 years)
Audi A6 2005 ➤ , Audi A6 Avant 2005 ➤
Brake system - Edition 04.2019
8. Bleeding brake system 159
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