Man, in SC/NC we have Suburban's, Camaro's, Charger's, Caprice's, Impala's, Mustangs [though I haven't seen one of those in a while], Intrepids, Crown Vic's, GTO's, Excursions, Tahoe's, Harley's and BMW's for the motorcycles. Some of the unmarked are "cop-style-sleepers" that have the limo-tint, quad exhaust, bling-bling for rims, low profile tires....you know, the kind to where you pull up to the light and start revving your engine to race. [Good thing I'm not into that.....;)] Some of the Tahoe's and Suburban's even have them.
You would
never in a million years suspect that they are a cop car until you see the
massive amount of lights all start going off. In this case, there is NO doubt that they are a cop. None, whatsoever.
My favorite has got to be this one Silver Hemi Charger. That sucker is HOT! It looks more like it belongs in a hot-rod magazine than it does law enforcement. Now, don't hold me to this but
I could have sworn I saw a silver 380z pulling someone over when I was coming home on 485 near Rea Road in Charlotte about 4-5 months ago. I couldn't get a good look because the trees at the exit ramp blocked my view rather quickly but I'm pretty well versed on my cars and it damn sho' did look like a 380z. My first thought was that it was the first foreign cop car I had ever seen.
Anyhoo, my point is that "recognizing" the cop cars won't always work. My advice would be to first acknowledge the undercover car of his presence, then simply dial 911 and inform them that you have an "questionable vehile wanting to pull you over" and that you would like confirmation that it is in fact an officer. As soon as you do? Pull the hell over immediately and inform the officer that 911 is currently on the phone and you just called to verify that he/she was legit.