Operation CHARM
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Mercedes Benz
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1991
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300E 4MATIC (124.230) L6-3.0L (103.985)
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Repair and Diagnosis
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Heating and Air Conditioning
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Compressor HVAC
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Testing and Inspection
Compressor HVAC: Testing and Inspection
MAS Control Unit Testing:
Connect the socket box and test cable.
MAS Control Unit Testing:
DIAGNOSTIC PROCEDURE
