If you hear a long beep for a few seconds and the LED in the switch 
* starts flashing when you switch on the parking aid, or while the system is activated, a system fault has occurred. Have the fault rectified by a qualified workshop.
* starts flashing when you switch on the parking aid, or while the system is activated, a system fault has occurred. Have the fault rectified by a qualified workshop.Note
If the fault is not corrected before you switch off the ignition, it will only be indicated by the flashing LED in the switch * the next time you switch on the parking aid by engaging reverse gear. However, you will still hear the warning beep if you activate the parking aid by pressing the button.
* the next time you switch on the parking aid by engaging reverse gear. However, you will still hear the warning beep if you activate the parking aid by pressing the button.