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S-Class (W140) 1991-1999: 300 SD, S 350TD, 300 SE 2.8, S280, 300 SE 3.2, 300 SEL 3.2, S320, S320L, 400 SE, S420, 400 SEL, S420L, 500 SE, S500, 500 SEL, S500L, 600 SE, S600, 600 SEL, S600L, 500 SEC, 600 SEC

W140 Air Condition Compressor Question

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Old Feb 16, 2009 | 04:48 AM
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dbmoylan
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W140 Air Condition Compressor Question
Would anyone happen to know what can cause a "click" noise about every minute coming from the air condition compressor on a W140 chassis / M104.990 engine? Would this happen to be the air condition compressor clutch? Is this part changeable w/out having to remove the air condition compressor & discharge the refrigerant? Thanks.
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Old Mar 10, 2009 | 02:15 PM
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09' E320
What year? May be able to pull codes and actual values from CCU unit in dash.

Quite possibly the electro magnetic clutch turning on and offf. It is replaceable.
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Old Mar 20, 2009 | 08:36 AM
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Thanks for reply. 1993 Benz 300SE / M104.990 inline 6 engine. Am monitoring right now since keeping same temp at vent of about 44F.
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