I am a newby in Benz. But I had everything else Germany does. I recently got this 300sd 1980. everything perfect except the A/C cold and hot as well as the crusie control. CAn anybody help?

Welcome to the site, and welcome to "The Evil Climate Control Servo". Do a search on "servo" and sit back and read for most of the day. As you search generates questions, come back and ask. If you have deep pockets, this will be no problem. If you're like most of us, read for fixes for the heat portion for the time being, and start to look for a good servo or replacement.
Start reading.........................

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Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

Your heat an AC are contolled electronically and by engine pump vacuum. I would start with checking out your vacuum system and make sure the doors that switch between defrost heat and dash vents open and close properly. your blend door could be stuck which is a vacuum problem (mechanical problem) or your electronic temp control is not operating. (electronic problem)
Your heater control valve could be non operational and your AC system could need a recharge! I know all this is a little complicated, but it's hard to know where to start with the info you gave us! A little more detail please?