For an 85˚ day, you should have a 55˚ vent temp if all the windows and doors are open. Your stock 560 is performing as designed. Your truck needs charging (Fords should be quite cold, even on high fan), and your V12 car needs the charge corrected. It's obvious any input I'm giving (based on considerable experience with A/C systems) is being ignored, so this is my last comment on this thread.

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Current stable:
1995 E320 157K (Nancy)
1983 500SL 125K (SLoL)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Gone and wanting to forget:
1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]