Couple of thoughts on carrying off your body in a car. If your gun is in a holster that's open or just jammed between the seat and the console, there could be a couple of problems with that, IMHO.
1. If you get into a car accident, even a small one, all kinds of crap that's not tied down or in glove box/center console will go flying around. I wouldn't want to have a gun do that, if only for a reason that even small ones are heavier than most objects their size and have edges (hammers, sights, etc.) and might do some damage at car crash velocities. Plus, you have a loose firearm that could potentially make its way out of your vehicle in such a scenario.
2. Cops are statistically in more danger during a "routine" traffic stop and knowing that, they approach these situations with some extra caution. Their reaction to a visible weapon within occupant reach will likely be more drastic during a traffic stop than even if they just saw you packing on the street. If you have a pistol that's plainly visible and you're pulled over, I suggest automatically rolling down the driver side window and putting both hands outside. The cop will know you did that for a reason and are trying to appear not threatening. You can calmly explain why you did that when he makes his way to you and he will know that your hands are nowhere near a weapon. If you keep a piece concealed in a console or glove box, DON'T keep your registration and insurance in the same spot.
3. Again, if your pistol is openly carried inside a vehicle, are you sure that you can retain it from another person in the vehicle? Not that your spouse would all of a sudden grab it and plug you for not asking directions!
I'm just saying that there could be a possibility that a carjacker or some crazy might just try and get into your car, so why give them a weapon in the process and create an extra problem for yourself?