Thanks Jochen!

Interesting, Straight forward (?) RGB with K bus to control the CID unit functions? I'll eventually try putting those pins on a scope. I'm assuming it's probably sync on green. If all goes well, a behind the glovebox micro pc with wifi, and VRS is a distinct reality. Don't know much about the K bus, I wonder if that signal can be thrown in the bit bucket during switch over to PC mode. Need to put together a bounceless switch.

I appreciate your great help!

JB