This buyer picked up new model 3 in the end of December, 2018. There are 2 types of sounds coming from the vehicle on intermittent basis. There is clicking from the charging port and whirring from batteries. Please see the video to hear them.
Clicking noise could be due to cold weather, but is not normal if it continues. Clicking noise should be brought up to the service center, but the whirring noise from the batteries are very normal. Whirring noise can be observed even in hybrid cars that use batteries like the Toyota Prius