Heres a tip if a officer pulls you over greet them with hey SIR/OFFICER hows your night. Instantly this removes the "great another import owner fear" Ive driven in alot of peoples car and been pulled over and the police get the responce of roll eyes, unpolite etc.
A general amount of chit chat is good, mainly because it will make the experence alot better. You've got a 50/50 chance of getting booked if your polite you'll come out of it 70/30. either way thinking wow that officer was nice, hope he gets some baddies tonight. The officer will think wow this bloke is alright wish all import drivers were as good as him. Heres a tip SMILE!
In all honestly, your suburb spells it to the officer. Your tone of voice prepairs him for whats ahead. Your body language implies if your hiding something or are particularly suss. Disabling your engine once they pull you over is a No-no once again something to hide. They learn how to read a person, why act like you have something to hide if you dont?
Lastly a Atmo is like screaming book me, and a number plate like ONBAIL is just a target.
This is my thoughts, If I was a police officer this would make my shit night good and i'd leave you alone. Dont forget they pull you over they have a diary and write down anything suss, I believe it is there next time too.