I honestly know nothing about electrical and a/c diagnosis. If I decided that right now I had nothing else to do today and I wanted to start trying to figure out what was wrong, beyond just looking at it and determining that none of the controls do anything anymore I really wouldn't even know where to start. It may end up not being that hard, but I just don't understand it.

Of course now I have to replace the turbocharger, find and fix whatever is loose in the drivers side front suspension, then figure out if that was why it pulls to one side or the other under braking before I should worry about the a/c lol. I do have another car to use until I fix the turbo and brakes though, so I'm not driving the mercedes anymore.