Replaced the ACC amplifier and it still acted funny...then, I checked and replaced all the fuses and VIOLA! Automatic Climate Control! The A/C compressor comes on when it is supposed to, and everything!

Thanks to all who offered assistance and tips. Especially to Larry Bible, who faxed some info to JCD, and to JCD who faxed it to me.

__________________
1978 300SD 149K miles silver-blue "Maxine" (mine!)
1979 300SD 318K miles red "Helga" (SOLD)
1980 300SD 321K miles yellow "Linda" (younger daughter's)
1980 300SD 148K miles blue (SOLD)
1980 300SD 153K miles green(parts car, SOLD)
Yes, I have a W116 fetish :-)