W124: "green" or "red" A/C temperature switch for R12 ?

[ke6dcj]

It's just too hot & humid NOT to run R12 in my 1988 300TE wagon (really an E36T AMG wagon).

While I've read that the "red" A/C temperature switch works for BOTH R134 and R12, I don't believe the "red" switch is optimum, as it doesn't match R12 characteristics/temperature curves, and doesn't turn the aux. fan on soon enough.

Can anyone verify this ?

Thanks,
:-) neil