We know that the elite has the autodip rear view mirror factory fitted but does a NON elite model have the wiring present and ready to install an autodip mirror or not?

have a look at the how to by hillper in the maintenance section.
http://www.omegaowners.com/forum/YaBB.pl?num=1158088953

My Elite was fitted with factory leather Sports seats from new so didn,t have the wiring in place.

It is a very simple wiring job only needing a couple of joins to wires that are readily accessable within the headlining.

Gets a bit more involved if you want to add the dipping feature for reverse and very complex if you require it to have the memory functions for the seat.

Fortunately I was not guided down that route as my seats are just electrical up/down so for me the retro fit was a simple job.

Dead easy to put the 3 wires you need from the courtesy light - not worth skimping.

TBH, popping on the reverse wire on is dead easy as well, just need to remove A pillar trim