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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Component Tests and General Diagnostics
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Automatic Air Conditioning (Auto A/C)
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Checking Compressor Clutch Cutout
Checking Compressor Clutch Cutout
MAS Control Unit Testing:
Connect the socket box and test cable.
MAS Control Unit Testing:
DIAGNOSTIC PROCEDURE
