My car is 2014 model. I started the car last week and I heard a loud “DONG” sound inside the car. The sound would come whenever I started the engine and came back once in a while when I was driving on the road.

There was no warning light or symbol displayed on the cluster.

Anyone know what is the problem of my car?

Thanks.

Mate, that is seriously funny to read.
Sorry I can't help you but my 2015 is a dong free zone!