►Audi A3 Cabriolet ►Controls and displays ►Instruments and warning/indicator lamps ◀Warning and indicator lamps
If the warning lamp lights up, there is a fault in the brake system.
Stop vehicle and check brake fluid levelStop the vehicle and check the brake fluid level. Obtain professional assistance if necessary.
Warning! Brake servo inoperative!You need to apply much more force to operate the brakes if the brake servo fails. Obtain professional assistance.
Warning! Fault in brake system. Please contact workshopIf the ABS indicator lamp 
and ESC indicator lamp 
light up together with the brake warning lamp and this driver message appears, the ABS, ESC and brake force distribution systems have failed WARNING!.
and ESC indicator lamp light up together with the brake warning lamp and this driver message appears, the ABS, ESC and brake force distribution systems have failed WARNING!.Drive to a qualified workshop without delay and have the fault corrected WARNING!.
Parking brake system fault! See owner's manual- If the warning lamp and the message appear after you switch on the ignition when the vehicle is stationary, please check whether you can release the parking brake. If the parking brake cannot be released you should obtain professional assistance. If the parking brake can be released but the warning lamp/message still appears, drive to a qualified workshop without delay and have the fault rectified.
- If the warning lamp and the message appear while driving, there may be a malfunction in the parking brake auto release or the emergency brake functions. You may not be able to apply or release the parking brake. Do not park the car on a gradient. Obtain professional assistance.
- Before opening the bonnet and checking the brake fluid level, observe the warning information on ►Link.
- If the brake warning lamp does not go out, or if it lights up when driving, the brake fluid level in the reservoir is too low - this may cause an increased accident risk. Stop the vehicle and do not drive on. Obtain professional assistance.
- If the brake warning lamp lights up together with the ABS indicator lamp and the ESC indicator lamp, this can mean that the control function of the ESC/ABS is not working. Input from the functions that stabilise the vehicle is no longer available. This could cause the tail of the vehicle to skid sideways. Drive carefully to the nearest qualified workshop and have the fault rectified.