250A. 100 will trip if the starter pulls over that.
Flame proof cable is double jacketed usually with a colored outer and white inner and it will be labelled.
Insert program boot disc is what it is saying. That unit cannot read its internal memory.
Quick fix, pull the plug on that unit.
Proper fix, convert to 2 DIN radio.
The mfd gauges are separate to the navi.
Shame you aren't in brissy. I would like a crack at fixing one of these.
Get it at the OEM point up front of off the BCM . If you can find a early sedan with the switch on the back use that diagram to find the trip wire.
Bit of dicking around but doable.
Pull it out, pop the top off, note the ribbon cable to the screen. If you have one it's sharp, if you have two it's toshiba .
I am building something custom around one of these and needed to buy one for the boards.