Still looking for validation that you are right and the law is an ass, huh?
OK:
1) I'm driving down the highway on a rainly night. A car passes me and signals that I should pull over. No way am I about to do that, but it's a patrol car by the looks of it, must be a ghost car or something, so I pull over. Two guys get out, I say "can I help you officer?" and they say "Yeah sucker, out of the car and give me all your money. This is a stickup."
2) Citizen is getting assaulted, she sees a 'patrol car' on the street and runs for it "Help! I'm being attacked!" "Geez, sorry lady I'm not a cop, I can't do anything for you."
The law is the law. Unless you want to challenge it in court, it's a losing game to try and argue your way out of it based on your limited understanding.
"As-is" does not trump legal requirements. You'd win the small claims court action agaist the dealer.
You say don't want problems ... then make sure you paint it before selling it in state. I'd take the nerf bars off it too. That screams "police vehicle".