It shows Part # 170 545 03 05 and description "Multi Purpose Relay". In the tech's notes he wrote "main electric relay module". I paid $328 for the part.

I do realize that I'm paying more, and I accept that. I'm not mechanically inclined, and since I don't plan to be - I realize that I pay more to have other people fix my problems. It's a trade off I can live with at this point in my remaining years on the planet :-)

I'd still like to figure out these codes though since they are in the tech's notes - curiousity gets the better of me.