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Go to the top of the page in the diesel forum... and read the sticky on MB AC.
That will give you some ideas and perhaps good questions..
Your assumption as to wires , with nothing smoking, and no fuses blown is not logical.
First you jump the low pressure switch on the Rec/drier to see if that is what has cut off electricity to the compressor TO SAVE IT from running without lubrication due to low refrigerant...
only jump it a few seconds....
then you are going to need to put gauges on the system and report the results...
but very specific criteria to get good pressures test results are needed... those are included in the Sticky at top of page.
Report back to here the results of jumping the low pressure cutout switch...
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