Just got my Defender HD8 and was playing around with it.It has the 2 or 4 wheel drive toggle switch and it has a differential lock toggle also. I know up turns the differential lock on but nothing changes in the digital gauge cluster. It shows the drive line and when I flip to 4x4 the front tires turn black in the digital read out and go off when I go back to 2 wheel drive but when I flip the differential lock on or off nothing changes. Should one of the wheels in the display turn off when switch is flipped off? Or do they both stay black whether switch is on or off?