I am the son of a diplomat, can I get diplomatic Immunity.?

Getting a card saying you have diplomatic immunity is an act between your emby and the foreign office who issues those cards. Since your dad is the main diplomat, it's not worth the effort to get that card. Now that you're 18, you could remind him of what he said. If you try to get a card without his knowledge, it will come back to hurt everyone. Best bet- start with him. Don't fret too much about taht card. If you want to avoid a speeding ticket, drive slower. If you commit a horrendous crime, your country will likely waive immunity for you and let you go to trial. And if you do something that's moderately criminal, you'll get PNG'd, which does no one any good, plus it's a big diplomatic embarrment for your emby.