i have an is200 2002
i added the headlight Washers and I can tell you that the cabling is there.
for the auto adjusting of the headlights you have only partial cabling, the connector for the ecu is there but cabling to lamps is stopping behind the fuses box. The tilt sensors are not wired and the wheel support don’t have fitting for the tilt sensors.
i added the auto dimming mirror but I had to take the wires from the fuse i but with the drawings it is easy.
the automatic transmission is a hell. You have to change the wiring the ecu because between manual and auto the ecu has more pins to control the gearbox solenoids and has the connections for the cruise control . I know this because I tried to add the cruise control.
the dashboard is different for the indication. And at the end probably you don’t have it written on your car papers and you can get problems with the police.
now as soon I have time I will add autolevelling lights with hid and the vsc. I saw no wiring but I have built it.
I added the navigation but I need original radio to activate but I’m studying how to do it .
i added the alarm system and even there no wiring for moovement detector in dome light and siren in trunk . System even without these parts works.