GTV
SILVER Star
I don't think you can just delete the upper computer on the non nav. There's a bit of info there going back to the instrument panel/ body ecu. Your transmitter might not work right, or door locks possibly.
Unplug the top computer and try driving it for a few days.
If you're bent on doing it relocate the top computer to the glove box.
I was wondering if that would be an issue as I’ve only seen this installed on foreign market 100’s.
Good idea unplugging it, I’ll give that a shot.