The warning lamp 
lights up when the parking brake is applied. The warning lamp will light up for about 20 seconds if the parking brake is applied with the ignition switched off.
lights up when the parking brake is applied. The warning lamp will light up for about 20 seconds if the parking brake is applied with the ignition switched off.
Caution: Vehicle parked too steepIf the warning lamp flashes and the message appears, the brake may not be strong enough to hold the vehicle. The brakes have overheated. The vehicle can roll away, even on a gentle slope.
Press brake pedal to release parking brakeTo release the parking brake, press the brake pedal and simultaneously press the switch 
(alternatively, use the auto release function
►Link).
(alternatively, use the auto release function
►Link).
Parking brake!There is a malfunction in the parking brake. Drive to a qualified workshop without delay and have the fault rectified.
Parking brake!There is a malfunction in the parking brake. Drive to a qualified workshop soon and have the fault rectified.
Audi hold assist: only available when door is closed, seat belt is fastened and engine is runningIf this message appears, make sure that the door is closed, the seat belt is buckled and the engine is running.
Audi hold assist: unavailableIf this message appears, the system requirements have not been met.
Parking brake: not applied !
If this message appears, it may be necessary to apply the parking brake.
Please release parking brakeIf this message appears, release the parking brake.
Parking brake auto release: system faultIf this message appears, press the brake pedal and then release the parking brake.
Parking brake system fault: anti-towing alarm blocked
Parking brake: not applied automatically
Caution: Vehicle parked too steep
Parking brake is appliedIf this message appears, press the brake pedal and then release the parking brake as necessary.
Note
For further information on the parking brake refer to
►Link.