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85 300TD a/c compressor won't work

I recently converted my a/c on my 85 300TD to R134. The system had a huge leak in the suction hose, which was replaced. The system was evacuated and I added three 11-ounce cans of refrigerant, but the compressor will not turn on. It was working fine before, so I was wondering if there was a switch or something that is not functioning properly, or if more R134 needs to be added.

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1984 300D Decrease in mileage

My Benz "Old Yella" had recently slipped a little in the miles per gallon dept. I have developed an obsession with the car and stay right on top of things mechanically so I was a little puzzled. The air filter was coming up on my periodic maintainence schedule so I decided on trying out a K+N. I usually change air filters after about 20,000 miles of use. This figure is flexible as all driving conditions are not the same. Dust, road salt and sand can all gather in the filter and constrict air flow which is essential to internal combustion engines.

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77 300D engine turns slow - wont fire up

I own a 1977 300D. I was driving home one day and I noticed when I arrived to Traffic lights the car acted like it wanted to shut off. I resumed driving and as I was getting close to my home, the car shut off. Since then I have replaced the battery, replaced the starter all with no luck. On a fully charged battery the engine turns slow, and acts like it want to start but then dies. Upon a second attemtp at starting, the engine gives me a click, and the engine does not turn! I am super confused. can anyone help?
thank you in advance!

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