for parking mode to be effective, you have to be connected to a source that does not turn off the camera when your car is off. the three choices are: a battery pack, an always on circuit in your car or a battery discharge prevention device.
if the camera turns off when you turn off your ignition and accessories, that circuit is not "always on". some circuits have a time delay where the connected device may be left on for a set amount of time before the power is cut.
if you want to utilize the parking mode capability of the A119, I recommend you install a BDP like the multisafer or the vicovation power plus. these devices are to be connected to an always on circuit | accessory circuit | ground and they will power whatever device (camera) is connected to it when you're parked until a certain time limit or a low voltage threshold is reached. it sounds a little daunting but it's not too difficult, the most time-consuming part of the install is hiding the wiring behind panels.
thanks again for the info.
Now I get it. no wonder there's nothing recorded after I tried the parking mode.
I guess my output isn't always on then.
but it's strange, how come before when I used the motion detection mode, it recorded even when car's off?
that's where I don't understand parking mode and motion detection mode.