Operation CHARM
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Mercedes Benz
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1992
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600SEL (140.057) V12-6.0L (120.980)
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Repair and Diagnosis
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Heating and Air Conditioning
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Testing and Inspection
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Component Tests and General Diagnostics
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Component Tests
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Electrical Test Program [ETP]
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ETP - Preparation For Test [22]
ETP - Preparation For Test [22]
Air Conditioning (A/C)
Models 140 up to MY 1995
Electrical Test Program (ETP) - Preparation for Test
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Remove A/C pushbutton control module (N22) and/or rear A/C pushbutton control module (N22/3).
Special Tools:
Conventional Tools, Test Equipment:
Connection Diagram - Socket Box:
Connection Diagram - Socket Box (Rear A/C):