Just picked up a 88 260e and its got a few quirks! The main problem is the climate control does not work! When you turn it on the blower comes on and you can hear it blowing, but nothing comes out the vents. I checked the fuse, all the vents are open, but nothing is comming out. My other problems are running rough at idle, and you get a vibration from the engine in the car. And the back windows don't go down. Any help would be great!

I have heat!!!!!!!! the blower motor was wired to run backwards!!!!!

Well, as I have heard numerous times, a "cheap" Mercedes is the most expensive thing you can buy!! This might be the case here but you will be so much more "educated" when you work through your problems.
Your rough idle - Check each and every fitting on the vacuum system and I am sure you will find some that are cracked and hard. Vacuum leaks are BAD! For about $75 from the Benz dealer and a few hours time, you can replace each fitting. Then I would suggest that you look at the check valves that are in the vacuum system. I bet you have at least one that is cracked, especially if they are all original.
Your vibrations can be a number of things, again, especially if this car has original parts. Motor mounts are one thing to check. The transmission mount is another to check. The center carrier bearing and mount is probably toast also. Check your flex discs also. I have a '91 300E with 189K on it and have had to work through each one of these items. You can get a "vibration" feeling also from the exhaust pipe mount that is attached to the transmission. I would bet that the rubber parts in that mount are gone.
I would suggest getting the mounts from the dealer, there is a difference. The other items you can get from our parts supplier from this website or ***************.
Good luck!!

Thanks Rick, going through the vacume lines already they don't look to bad? Picked up a minivac vacume tester the other day to test the Climate control Vac lines now testing the rest of them. Could not believe the blower motor was runnig backwards!!!! My buddy said after we checked everything without pulling the dash lets see if the blower motor is spinning the right way. I was like naaaa who would do that? Then as soon as he filpped the wiring around DING HEAT! Now I need to charge up the AC to check for leaks! the center vents aren't working but for now I'm good I will pull the dash and go through the rest of the pods after I get the rest of the quirks worked out! Next the non-working back windows!!!