Hey everyone its been awhile since i had any questions. But the time has come and I want to fix the air conditioning on the old benz and I'm keeping the R12 system. Don't worry we have a stash of it so that covers that base, however I'm wondering what recommendations everyone has about what to replace and inspect before spending tons of money on the AC system. Firstly the compressor has to be replaced because it has not had a belt on it since we got the car years ago and the clutch will melt the blower fuse when I turn the AC knob on in the car (the aux fan was disconnected while doing this test). Nextly, I have a spare Aux fan I'm going to install since the old one is shot completely. My plan is to throw on a compressor and a belt and charge the system and see if it even works before dumping more money in only to find out my evaporator core has a hole in it. Also before charging the system I'm going to pull a vacuum for 2 hours to make sure it holds vacuum before adding refrigerant I just wanted to specify that, if any leaks then I'll fix them. My main questions are how long should you have to pull a vacuum and also what size is the AC belt on a 1983 240D? I've heard a 13x875 belt will work but just want to double check, and of course your recommendations.