If you hear a long beep for a few seconds and the diode in the switch 
* starts flashing when you switch on the parking aid, a system fault has occurred. Please have the fault corrected by an Audi dealer or qualified workshop.
* starts flashing when you switch on the parking aid, a system fault has occurred. Please have the fault corrected by an Audi dealer or qualified workshop.Note
If the fault is not corrected before you switch off the ignition, it will only be indicated by the flashing diode in the switch * the next time you switch on the parking aid.
* the next time you switch on the parking aid.