Ampera aka IGOR
Tesla Model 3 P
Well after over 5 years I have just found another reason the Ampera will bong at you. I had just charged up at a public charger using my own cable, unplugged at the charger and my phone rang. I had not disconnected the car end and whilst on the call the car started bonging, not as loud as the alarm or the double toot when set on a delayed charge. At first I thought it was the cable disconnection alarm, which I don't have set anyway, but it was not as loud. Trying the keyfob to open the door had no effect as it would do with the normal alarm, it was only when I unplugged my cable from the car that it stopped.