I'm saying it shouldn't make a difference if it's hardwired or just plugged in because it probably uses the internal battery. If it absolutely needs to be hardwired to a permanent live connection for parking mode to work, then that might cause problems.
So what are your saying, avoid using parking mode?
Parking mode usually uses the internal battery to wake the recorder up if there's sudden movement detected. You don't really want to have your camera on and running from your car battery when the engine is off.
For parking mode, do you need to hard wire or can you use the cigarette lighter socket?
If you're doing 'go to jail' speeds, yes. If you're a relatively small percentage over the limit then no, they can't. With the wide angle lense it makes it even more tricky and they can only narrow it to a certain range (y)