Audi A8 2003 Workshop Manual page 105

– Fit protective cap onto piston.
– Push piston into caliper housing, exerting even pressure.
The protective cap must fit securely in the groove; if necessary,
apply additional pressure with piston resetting appliance.
Note
Brake pipe in brake caliper: 19 Nm
♦
Brake line connection at brake pipe: 12 Nm
♦
Caution
Before driving vehicle for the first time, make sure function of
brakes is OK.
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Audi A8 2003 ➤
Brake system - Edition 03.2013
5. Brake caliper (ceramic brakes)
99