Ok, took it in and scanned it. Nothing. All parameters good. No codes. Ran great.
Next, I will email Merc and tell them all looks good, but it is still rich.
If anyone is tight with Dustin at Whipple, let's get him in on this since he can re-map. I don't want to call and bother him yet, till I get as far as I can with Merc.
Just as I figured. The computer check's just fine. There is no error, it's just the program!